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The processor Ryzen 7 2700: eight cores for $300

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Since the official announcement of processors Ryzen second generation (Pinnacle Ridge) been a couple of months, and then it’s time to get re-acquainted with them. As usual AMD has introduced two thousandth Ryzen series clearly hastily: ecosystem at the time of the announcement has not been definitively established, and this was especially true of motherboards. The new platform based on a set of logic X470 just started to go with conveyors manufacturers and were marred by various shortcomings, and the commercially available Socket AM4 old motherboard had BIOS quality optimization for micro-architecture Zen+. All this led to the fact that in the original testing of Pinnacle Ridge there are certain difficulties, which are generally smeared impression on the company AMD updated processor lineup. But to date, all fixable problems of the platform should already be fixed and therefore repeated testing is quite interesting and clearly worthwhile experience.

In its April review of desktop processors with the microarchitecture Zen+, we dealt with the flagships – 7 2700X and Ryzen Ryzen 5 2600X – chips, which have the maximum possible clock frequency, but differ very indiscreet energy appetites. Now we decided to go to new Ryzen second generation on the other side and look at the models that have the letter X in the title and have a much more restrained characteristics TDP: 65 W instead of 95 or 105 watts.

Somehow had the impression that the models “without X” in the first place are different from the older ones that do not support Extended Frequency Rangethat adds a couple of hundred MHz to the processor frequency at low load. But really it is not so: XFR 2 processors Ryzen Ryzen and 7 2700 5 2600 is supported, especially because it is closely woven with other technology avtoradgona, Precision Boost 2. The main difference of the younger members of the lineup Pinnacle Ridge is reduced to a reasonable quantities of energy consumption and heat dissipation. This feature makes Ryzen Ryzen and 7 2700 5 2600 so interesting options. On the one hand, these processors can be put in a compact and energy-efficient systems and to use them for a cheap cooling system, and on the other they remain fully-functional media micro Zen+ with a rather high real clock frequencies.

Moreover, Ryzen Ryzen and 7 2700 5 2600 as their older counterparts, can be easily overclocked due to the unlocked multiplier. Why be interested in such offers can buyers who just want to save a little. The official price of the chips without “overclocking” the letter X in the title for $20-30 lower and the performance of them, apparently, once set up properly, you can squeeze almost the same.

In this review, we’ll talk in detail about Ryzen 7 2700 – Junior OCTA core Pinnacle Ridge with the support of SMT. Formally, it is stated on polyvalence lower than Ryzen 7 2700X, the nominal clock frequency. But I think it is possible not to pay any attention. Check?

#7 2700 Ryzen in detail

The release of the second generation Ryzen did not bring in the CPU market no revolution. Fresh chips were enough qualifying upgrade media micro Zen, which was not even fixed the critical issues of the original design: limited overclocking potential, high latency inter-core interaction and a capricious memory controller. However, improvements to deny still impossible. The transition to more advanced production technology with a 12-nm rules allowed AMD to a few hundred megahertz to increase such frequency. Further development of technology of adaptive avtoradgona taught new processors aggressively to increase the frequency of low-flow at low load. In addition, improvements have affected the subsystem cache memory, which has reduced their latency, especially on the second level. All of this made the second generation Ryzen faster than the first in the performance of any applications and allows us to talk about progress.

And in the case of Ryzen 7 2700 this progress must manifest itself even more clearly than when comparing the older AMD processors first and second generation. After all, chips are artificially limited by the heat package, which belongs Ryzen 7 2700 crucial, as the turbo mode, the implementation of which in new AMD processors were noticeably improved. Advanced technology Precision Boost 2 (PB2) and Extended Frequency Range 2 (XFR2) not only got usedaboutgreater freedom in the interactive frequency control, but also learned to flexibly adjust the CPU speed at any load, any number of cores. That is why Ryzen 7 2700 and should be much better informed energy-efficient AMD osmeteria, Ryzen 7 1700, in which such intellectual technologies was not included the turbo mode only when the load on one or two cores, and the maximum achievable frequency was below 300 MHz.

Ryzen 7 2700X Ryzen 7 2700 Ryzen 7 1800X Ryzen 7 1700X Ryzen 7 1700
Code name Pinnacle Ridge Pinnacle Ridge Summit Ridge Summit Ridge Summit Ridge
Production technology, nm 12 12 14 14 14
Cores/threads 8/16 8/16 8/16 8/16 8/16
Base frequency, GHz 3.7 V 3,2 3,6 3,4 3,0
Frequency in turbo mode, GHz 4,3 4,1 4,0 3,8 3.7 V
Acceleration There There There There There
L3 cache MB 2 × 8 2 × 8 2 × 8 2 × 8 2 × 8
Memory support DDR4-2933 DDR4-2933 DDR4-2666 DDR4-2666 DDR4-2666
PCI Express 16 16 16 16 16
TDP, watts 105 65 95 95 65
Socket Socket AM4 Socket AM4 Socket AM4 Socket AM4 Socket AM4
The official price $329 $299 $349 $309 $299

One of the most important features of Ryzen 7 2700 – heat pack, a limited part of 65 watts. This is as much as 40 percent lower than the estimated heat release of the next member of the lineup, Ryzen 7 2700X. But there is no reason to say that senior and energy efficient Ryzen 7 of the second generation as seriously differ in clock frequencies, as heat dissipation. Even from the point of view of basic frequency Ryzen 7 2700X faster younger brother is only 15 percent, and the difference in maximum frequency given the turbo at all and is only 200 MHz. In other words, Ryzen 7 2700 does not seem somehow a compromise.

This is confirmed in practice. At full multithreaded load at rated speed Ryzen 7 2700 is able to hold a frequency of about 3.4 GHz.

Note that the supply voltage is approximately 1,037 In that provides extremely low power consumption and heat Ryzen 7 2700. Thus, according to the on-chip monitor, it does almost fit into the promised 65 watts.

Despite this, the boxed version Ryzen 7 2700 AMD completes the Wraith Spire cooler with RGB led, which according to the specifications compatible to the CPUs with a heat pack 95 watts.

And this means that a small acceleration Ryzen 7 2700 will be possible even with the boxed cooler. Although it is worth remembering that at frequencies above 3.9 to 4.0 GHz processors Ryzen second generation greatly increasing their thermal and power characteristics, so for good overclocking will require a cooling system, can keep the CPU around 200 watts of heat.

The nominal clock frequency and operating voltage — the only thing Ryzen 7 2700 differs from the older processors. It is compatible with Socket AM4-motherboards based on chipset X470 and based on older chipsets X370, B350 A320 and (after updating BIOS), and officially supports DDR4-2933 SDRAM (while unofficially is quite efficient with DDR4-3466). Moreover, considering the energy efficiency Ryzen 7 2700, you can use a cheap platform, equipped with high quality multi-phase voltage Converter. In sum, all this means that if you don’t focus on acceleration, Ryzen 7 2700 compared Ryzen 7 2700X allows you to save not only buying the CPU, but the motherboard cooling system.

However, you must keep in mind that the new algorithms PB2 and XFR2 that control the turbo, into account in their work not only CPU, but also parameters such as the instantaneous temperature and power consumption. And even more so now in the formula entered frequency characteristics of the voltage Converter on the motherboard. This means that in the system with a simple cooler and a cheaper motherboard real working frequency Ryzen 7 2700 will be lower than in a system with more quality components.

To treat this fact should seriously. In the case of Ryzen 7 2700 technology PB2 and XFR2 can add to the base frequency of the processor additional 900 MHz, which can affect performance dramatically. For example, when conducting experiments in the platform with the motherboard ASUS Crosshair VII Hero and a cooler Noctua NH-U14S we even managed to achieve what Ryzen 7 2700 working in nominal mode, when a certain load was faster than the flagship CPU of the previous generation, Ryzen 7 1800X.

To illustrate the variation of performance Ryzen 7 2700 at different loads we built the following chart, which displays the relative performance of AMD processors in the test Cinebench R15 rendering when using different numbers of compute threads. Indicators Ryzen 2700 7 taken as 100 %, the other results of the test are normalized relative to these values.

Indeed, when you work with a small number of computing threads Ryzen 2700 7 looks very attractive. In this case, it not only significantly outperforms Ryzen 7 1800X, but loses senior Ryzen 7 2700X only within 5 percent. Backlog as Ryzen 7 2700 from processors with higher heat pack is observed mainly in heavy multi-threaded load, when to develop a high frequency, it does not 65-watt limit.

Clearly you can see this in the following diagram, where we collected data on the dependence of the real frequency Ryzen 7 2700 of the load, which was observed in the testing in Cinebench R15 with the use of different numbers of computing threads.

Presents the results speak for themselves. When the load on one or two core Ryzen 7 2700 is able to develop a frequency up to 4.1 GHz, and the load on three or four cores allows the processor to work on frequency of 3,6-3,75 GHz. The further increase of CPU load causes the upper limit of the real frequency to get close to around a 3.4-3.5 GHz.

#Acceleration

As we have discovered in past testing members of the family Pinnacle Ridge, overclocking potential of these processors is very limited. Moreover, if we talk about the older Ryzen 7 2700X, then its acceleration “in the forehead” actually, in many cases, deprived of any sense, because it leads to a marked decrease in single threaded performance. However, in the case Ryzen 2700 7 the situation is somewhat different. Its nominal such relatively low frequency limits of the semiconductor chip and performance can be brought to the level of the older brother through the acceleration.

All conclusions about the overclocking features that we’ve made when meeting with Ryzen 7 2700X, fully apply to today’s hero. This means that the most effective frequency increase above the nominal value can not count. When crossing a 4-GHz milestone crystals Pinnacle Ridge starts to require serious nonlinear increasing voltage, which leads to a sharp rise in operating temperatures and heat dissipation. So if you expect to overclock Ryzen 7 2700 above 4 GHz, you’ll need a motherboard with the powerful Converter power and efficient cooler or even liquid cooling system.

For example, in our experiments we use the cooler Noctua NH-U14S, and with him we managed to overclock the test Ryzen 7 2700 to frequency of 4.1 GHz.

As you can see on the screenshot, the CPU core temperature is kept at a relatively low level — do not exceed 78 degrees. However, this does not mean that the frequency can be easily increased further. In this case, to ensure stability enough voltage 1.35 V, but even with these parameters, the real power consumption of a processor is estimated at 170 watts.

If you try to shift the frequency of the processor by another 100 MHz up to achieve stability of supply voltage is required to increase above 1,425 V. this dramatically increases the dissipation, and the cooler class Noctua NH-U14S to combat overheating of the CPU no longer enough. In other words, if 4,1 GHz and not the maximum possible acceleration, then at least limit appropriate. Besides do not forget that it is absolutely safe for health of semiconductor crystal Pinnacle Ridge are considered to be voltage not higher than 1.33 to 1.34, and the crossing of the border could damage the lifetime and reliability of the processor.

Here pertinently to remind, that overclocking Ryzen 7 2700X we also had to stop at the turn of 4.1 GHz. And this means that senior and Junior fosmidomycin Ryzen second-generation accelerated about the same. That is, having the processor Ryzen 2700 7, to achieve the performance level of the Socket AM4 flagship is possible. That he attracts: in the case of Ryzen 7 2700 save on the purchase, and then to regain the missing features of the processor through overclocking – quite a realistic scenario. The only thing: in this case, we highly recommend not to try to reduce the budget build due to the motherboard and cooler from them will depend largely on the success of overclocking.

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PC / Laptop

Is it possible to save on the mother Board when you buy 8-core Intel? Find out on the example of GIGABYTE AORUS PRO Z390

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Not sure that regular readers 3DNews frequently visit websites of a motherboard manufacturer. But I sort of activity have to do it very often. Getting into the hands of Z390 GIGABYTE AORUS PRO, I immediately examined the characteristics of the product on the official website of the Taiwanese company. And what do we see? The first thing to GIGABYTE I draw your attention is the presence of a 13-phase power subsystem. I remember before the manufacturers first advertised chips such as the RGB backlight, cool built-in audio section and the presence of certain modern connectors. Well, comrades-zhelezyachniki, after the release of 8-core processors Coffee Lake Refresh the situation has changed radically. That is why it was decided to test Z390 GIGABYTE AORUS PRO with four from Intel and see how the power Converter can handle overclocking Core i9-9900K up to 5 GHz. But first, let’s take a closer look at the cost.

GIGABYTE Z390 AORUS PRO

Z390 GIGABYTE AORUS PRO

#Specifications and packaging

I note that you will meet two versions of PRO-motherboard GIGABYTE. I consider “simple” modification, devoid of the wireless communication module. Recall that the set of logic Z390 hardware Express supports the standards 802.11 ac and Bluetooth. Model Z390 GIGABYTE AORUS PRO WIFI is an average of 1,000 more. So if you don’t want to mess with a wired Internet connection, you can pay attention to this version of “Proshka”. In the rest of the Board came out of the same. Main technical specifications GIGABYTE AORUS PRO Z390 is given in the table below.

Z390 GIGABYTE AORUS PRO
Supported processors Intel 9-th and 8-th generations (Core, Pentium and Celeron Gold) for LGA1151 platform-v2
Chipset Intel Z390 Express
Memory subsystem 4 × DIMM slots, up to 64 GB of DDR4-2133-4266 (OC)
Expansion slots 3 × PCI Express x16
3 × PCI Express x1
The storage interface 1 × M. 2 (Socket 3, 2242/2260/2280/22110) with support for SATA 6 Gbps and PCI Express x4
1 × M. 2 (Socket 3, 2242/2260/2280), support a SATA 6GB/s and PCI Express x4
6 × SATA 6GB/s
RAID 0, 1, 10
LAN Intel I219-V, 10/100/1000 Mbit/s
Audio ALC1220 Realtek 7.1 HD
Interfaces on the rear panel 1 × HDMI
1 × RJ-45
1 × optical S/PDIF
2 × USB 3.1 Gen2 Type A
1 × USB 3.1 Gen2 Type C
4 × USB 2.0 Type A
3 × USB 3.1 A Gen1Type
5 × 3.5 mm audio
Form factor ATX
Price 14 500 rubles

The motherboard is Packed in a large and colorful cardboard box. In addition to the Board, it was a lot of accessories, both useful and not:

  • user manual, sticker with the logo of AORUS and other labels for wires, and a CD with software and drivers;
  • four SATA cable;
  • extension cable to connect the RGB strip;
  • two thermocouples;
  • additional screws for securing the SSD;
  • set ASUS q-connectors;
  • HB SLI-bridge to connect two graphics cards NVIDIA GeForce.

#Design and capabilities

So, Z390 GIGABYTE AORUS PRO — Board form factor ATX. Because in front of us is not a budget device, it uses the undiminished circuit Board with sides 305 and 244 mm. Regular readers know that I do not like truncated ATX: manufacturer of such devices “cuts” a part of the PCB, and in the end when installing Board in the computer chassis part PCB slack — in this condition, you must carefully connect the memory modules and 24-pin power supply connector not to break the PCB.

The picture above clearly shows that to the layout of components Z390 GIGABYTE AORUS PRO is though not serious, but still claim. But let’s order.

To the layout of expansion slots, no complaints. Closest to the CPU socket is a connector PCI Express x1, and followed by a PCI Express x16 slot — the main PEG port, which in 99% of cases will be installed graphics card. Such a layout I think is perfect as it allows you to set up on the CPU any cooler. For example, GIGABYTE AORUS PRO Z390 on friendly terms with such “monsters” like the Noctua NH-D15 and its Archon X2. If you plan to use the video card, the cooling system which occupies only two slots, you will lose nigersan slot PCI Express x1. At the same time, more importantly, retained access to both M. 2 sockets — manufacturer additionally equipped with aluminum cooling systems. If you plan to use two graphics adapters, you will lose one PCI Express x1. Paired arrays AMD Crossfire and NVIDIA SLI work under the scheme x8+x8. The third PCI Express x16 uses only four lines. All the expansion slots conform to PCI Express 3.0.

I note that both PEG port is reinforced, and all three PCI Express x16 slots are double locking and additional soldering points. In total, according to the manufacturer, these design solutions strengthen connectors 1.7 times when the load on the fracture, and 3.2 times when the load on the pulling.

Reinforced at the Board and the DIMM slots.

The undoubted advantage of Z390 GIGABYTE AORUS PRO is the presence of eight 4-pin connectors for fans connection. It supports even the fans power up to 24 watts. Using the technology Smart Fan 5 can be controlled by impeller with shim and without it (that is, fans with 3-pin connectors). Connectors SYS_FAN5_PUMP and SYS_FAN6_PUMP, soldered next to the DIMM slots intended for connection of the pump liquid cooling system. If the system will be used maintenance-free “dropsy”, then this arrangement can be considered a failure — the cable from the waterblock would have to pull across the memory modules, and it’s ugly. I would place the GIGABYTE one PUMP connector would set as close to the CPU socket. If you build a PC custom DLC, you can connect a pump with reservoir that will be fixed, e.g., on the bottom of the housing towers will be convenient. Only in the case of very large Cabinet form factor Full Tower, make sure that the length of the wires coming from the pump will be enough.

To the SYS_FAN1 connector, located next to the power connector of the CPU, risen is not very easy — especially if you have already installed the cooler on the CPU. On the other hand, it is clear that positioning this connector in a different place would prevent the M. 2 slot.

Z390 GIGABYTE AORUS PRO has two M. 2 ports, equipped with aluminum radiators. The manufacturer claims that the cooling system Thermal Guard effectively dissipates heat, helping to eliminate the cause of the throttle with respect to M. 2 devices, but the specific data unfortunately, the product description is not given. There is only an abstract graph. Top connector allows you to install SSD formats 2242/2260/2280/22110, supports SATA 6 Gbps and PCI Express 3.0 x4. The lower M. 2 slot supports installing the SSD 2242/2260/2280 formats, it also summed up the four lines PCI Express 3.0, and it can also operate in SATA mode.

Also on the motherboard has six SATA connectors 6 GB/s.

When assembling the system unit consider the fact that when using the M. 2 port will be disabled some SATA connectors, as they divide throughput PCI-E with each other. All possible combinations when connecting the drive displayed in the table above.

Among the internal connectors note the presence of USB 3.1 Gen2. In my opinion, the port and internal USB 3.1 Gen1 soldered in the wrong places: they are removed from the edge of the circuit Board with a built — in protruding wires again will look not very pretty.

In the bottom of the Board there are pads for connecting the front panel audio connector, 12 – and 5-volt RGB strip, TPM module, S/PDIF and two USB 2.0. In the upper part of PCB, next to the DIMM slots, show up more blocks to connect the 12 – and 5-volt RGB strips. As you can see, no backlight in 2018 — will. All connected to the motherboard of the tape and fans are configured in one application called RGB Fusion.

As for the backlight directly on the Board itself, the LEDs supplied with the inscription and the AORUS logo on the chipset, the audio path and the DIMM slots. Backlight Z390 GIGABYTE AORUS PRO supports 16.8 million colors and 11 modes.

Among the external connectors deduced on panel I / o, note the presence of three ports USB 3.1 Gen1: two A-type and one C-type. From the video outputs on the I/O panel has HDMI only, which, in my opinion, enough for those who will use the built-in Intel graphics. The rest of GIGABYTE AORUS PRO Z390 there is a fairly typical set of interfaces.

It should be noted that the plug on the I/O panel is already built into the motherboard. Personally, I think this design decision the undoubted advantage of the device in question.

A test Board equipped with high-quality Gigabit network controller Intel I219-V and sound chip Realtek ALC1220-VB. The audio codec has a ratio of “signal to noise” of 120 dB and an intelligent amplifier that automatically determines the impedance of the connected headphones. Separately, the manufacturer notes that the new controller enables us to convey to the Network the voice with a microphone connected to the 3.5 mm Jack on the front or on the rear panel. In addition, the tract is equipped with special capacitors WIMA FKP2.

 

So we got to the main element Z390 GIGABYTE AORUS PRO — power processor and other components. Please note that for CPU power, in addition to the existing 8-pin connector, there is provided another 4-pin connector. I note that not all power supplies are equipped with additional wires. At the same time, my experience is that overclocking Core i9-9900K at home is enough one such connector in 8 pins. All the power connectors of the motherboard are strengthened — increased contact area when connecting the cables of the power supply.

So, GIGABYTE claim that the power Converter Z390 AORUS PRO consists of 13 phases, 12 of which are unique to the CPU. Also on the official website of the manufacturer claims that the GIGABYTE AORUS PRO Z390 designed for overclocking all cores 8-core Coffee Lake Refresh to 5GHz and above. We’ll check.

Power management PWM controller ISL69138 from Renesas Electronics which, judging by the official documentation, supports a maximum of seven phases. Therefore, in reality, the power subsystem is working according to the scheme 6+1. Just phase GIGABYTE AORUS PRO Z390 required to operate the CPU, a dual, and this, as you know, a great springboard for marketers. So, each channel includes a pair of inductance coils, two field-effect transistor SiC634 from VRPower and, accordingly, the doubler Renesas Electronics ISL6617A. Well, we are seeing a nice set for the Board in the medium price range. The MOSFETs marked “hold” the current up to 50 A.

About the power Converter Z390 GIGABYTE AORUS PRO, I’ll tell you in detail in the second part of the article.

For the power elements of VRM zones correspond fairly massive aluminum radiators that are connected to each other using copper heat pipes.

SOURCE

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The Intel Core i5-9600K: shestiyadernik of osmeteria of shestiyadernik

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Coming to the CPU market Intel Refresh Coffee Lake has become a landmark event. Still, with the advent of processors with eight cores completely stuck in the role of standard option for the productive desktop, leaving no space in this niche for chips past generations with six or four cores. So it is not surprising that the new osmeterium we try to pay as much attention they really deserve. And at the moment we have published three expanded material about eight Coffee Lake Refresh, which is strongly recommended reading:

However, Coffee Lake Refresh is not only fosmidomycin. It is an absolutely full-fledged processor family, which in the relatively near term will stretch across all market segments, starting from the top, which is now home to the processors with eight cores, and ending with the budget, which are intended for Quad core or even dual core CPU. The massive expansion of the habitat Coffee Lake Refresh is expected by the end of the first quarter of next year, when Intel will finally be able to more or less cope with all your production problems, but now such processors to identify with only one osmeterium impossible.

The fact that the family of Coffee Lake Refresh Core models thousandth of the series, in its present form includes three members of which have eight cores, only two. Along with the OCTA-core Core i9 shestnadcatiletnim-9900K and OCTA core, but devoid of support Hyper-Threading Core i7-9700K, microprocessor giant was released also six-core processor Core i5-9600K. At first glance it looks like the long-available Core i5-8600K. However, it is a full analogue of the he did not is because Core i5-9600K using the same semiconductor base, as in the eight-core Core i9-9900K and Core i7-9700K. That is, Core i5-9600K is a six-core processor built on eight-semiconductor crystal Lake Coffee Refresh with a couple of deactivated cores.

To understand the causes of Core i5-9600K one company with Core i9-9900K and Core i7-9700K not so difficult. No matter how perfected to the present time the 14-nm process technology, Intel is still in need of implementation of the chips defective in the production of senior Coffee Lake Refresh. Semiconductor crystals eight cores have an area of about 174 mm2, and the appearance defective chips in the defective individual cores or partly failure of the cache memory when it is inevitable. The existence of Core i5-9600K lets not write them off to the scrap and to use efficiently – in a processor with reduced a quarter the number of cores.

Technological affinity is a Core i5-9600K with eight-core Core i9-9900K and Core i7-9700K, not Core i5-8600K something even plays into the hands of users. Use to release a six-core derivative of the Coffee Lake Refresh the approaches and processes of making Core i5-9600K unique offer – shestiyadernik with solder under the CPU lid. And this means that the Core i5-9600K may be much more interesting to overclock than the Core i5-8600K, where internal is polymer thermal interface thermal grease with a fairly mediocre thermal conductivity. In other words, Core i5-9600K better than the Core i5-8600K, at least the fact that it does not need to scalp.

While Core i5-9600K inherited one of the main trumps its predecessor – a relatively affordable price. Officially, the new shestiyadernik valued at $262, that is, it is more expensive than the Core i5-8600K, just four dollars. And what’s more, at a price close to the recommended, it is really possible to buy, in contrast to the same Core i9-9900K and Core i7-9700K, the availability of which sell extremely limited, but real retail prices have nothing to do with the official.

It is not surprising that practical aspects of the operation of such a processor are of genuine interest. After all, Core i5-9600K in the family Coffee Lake seems to Refresh the current reality the most beneficial option in terms of performance and price, since it offers the lowest unit cost of the core. Given all this, we decided to dedicate six-core Core i5-9600K a separate review which will definitely answer the question of how consumer quality of this novelty are correlated with the its predecessor, the Core i5-8600K.

#Core i5-9600K in detail

So, Core i5-9600K is the most affordable desktop processor Intel, built on the design of the Coffee Lake Refresh. He has only six, not eight cores, but he is younger and cheaper OCTA-core sibling in the face of Core i7-9700K — 30% from the point of view of official prices or more than 40%, in terms of real prices.

  Core i9-9900K Core i7-9700K Core i5-9600K
Code name Coffee Lake Refresh Coffee Lake Refresh Coffee Lake Refresh
Production technology 14++ nm 14++ nm 14++ nm
Socket LGA1151v2 LGA1151v2 LGA1151v2
Cores/Threads 8/16 8/8 6/6
Base frequency, GHz 3,6 3,6 3.7 V
Maximum frequency in turbo mode, GHz 5,0 4,9 4,6
L3 cache MB 16 12 9
TDP, watts 95 95 95
Memory support DDR4-2666 DDR4-2666 DDR4-2666
PCI Express 3.0 16 16 16
Graphics core UHD Graphics 630 UHD Graphics 630 UHD Graphics 630
Price (official) $488 $374 $262

Like its relatives, Core i5-9600K is a modern version of intelliscore 14-nm process with the conditional name “++ nm 14” and has an unlocked multiplier, theoretically allowing for easy overclocking. Like all other proposals for the platform LGA1151v2, Core i5-9600K is based on the microarchitecture Coffee Lake and is equipped with integrated graphics core UHD 630 Graphics (GT2).

Despite the fact that according to the model number between the Core i5-9600K and Core i5-8600K an abyss, the processors are quite similar in passport characteristics. The translation series Core i5 design Coffee Lake Refresh Intel did not change any fundamental parameters. Core i5-9600K as Core i5-8600K, remained shestiyadernik without the support of Hyper-Threading with the cache memory of third level rate of 1.5 MB per core (9 MB in total).

At the same time, the diagnostic utility CPU-Z allows you to verify that the basis of the Core i5-9600K on a different semiconductor chip, a new modification of the P0, U0 and not used in processors Coffee Lake last generation, in which the number of compute cores was not more than six.

This means that from the point of view of the internal structure Core i5-9600K – only a distant relative Core i5-8600K. In the new shestiyadernik uses the same OCTA-core semiconductor chip, as in Intel Core i9-9900K and Core i7-9700K, but with the pair locked at the stage of production of cores. And from this follow important conclusions. First, this means that Core i5-9600K present the first hardware package fixes against vulnerabilities Meltdown and L1TF (Foreshadow). Second, the memory controller that the processor is certified to support 128 GB DDR4 SDRAM, which will be set after an upcoming appearance in the sale of a 32-Gigabyte modules.

Notable differences Core i5-9600K Core i5-8600K is in clock frequencies. New shestiyadernik has a 100 MHz higher base frequency and more aggressive turbo mode, allowing it to accelerate to 4.6 GHz with low-flow load vs 4.3 GHz its predecessor. Best clock speed in turbo mode Core i5-9600K promises and under full load on all cores. Set it to 4.3 GHz, while the Core i5-8600K in the same conditions works only on 4.1 GHz.

Fully frequency characteristics of turbo for new and old LGA1151v2 processor collected in a table.

Base frequency, GHz Frequency in turbo mode, GHz
1 core 2 cores 3 core 4 cores 5 cores 6 cores 7 cores 8 cores
Core i9-9900K 3,6 5,0 5,0 4,8 4,8 4,7 4,7 4,7 4,7
Core i7-9700K 3,6 4,9 4,8 4,7 4,7 4,6 4,6 4,6 4,6
Core i7-8700K 3.7 V 4,7 4,6 4,4 4,4 4,3 4,3
Core i7-8086K 4,0 5,0 4,6 4,5 4,4 4,4 4,3
Core i5-9600K 3.7 V 4,6 4,5 4,4 4,4 4,3 4,3
Core i5-8600K 3,6 4,3 4,2 4,2 4,2 4,1 4,1

Speaking of Intel Core i9-9900K and Core i7-9700K, we noted that their operation on the maximum frequency stated for turbo speed, leads to higher heat dissipation and power consumption far beyond the limits of TDP, traditionally installed in a 95 watts. Therefore, the work of fosmidomycin on the frequencies given in the table above, is possible only with active functions of the Multi-Core Enhancements, which abolishes all restrictions on energy consumption, and assuming the use of high-quality motherboards and powerful cooling systems. With Core i5-9600K situation should be easier. In multi-threaded load stress test Prime 95 29.4 (Small FFT with AVX), real consumption Core i5-9600K a quasi-nominal mode with active Multi-Core Enhancements at a frequency of 4.3 GHz is “only” 115 watts. And this means that in a typical common applications, this processor is working at maximum turbocheetah, most likely, 95-watt border will appear.

Core i5-9600K, like other desktop processors generation Coffee Lake Refresh, compatible with any LGA1151v2-motherboards, built with the help of those chipsets with the numbers from the fourth hundreds. In boards based on Intel Z390 new shestiyadernik will work out of the box, and for boards on Intel Z370, H370, B360 and H310 may need a BIOS upgrade.

#Temperature and energy consumption

The Coffee Lake Refresh processors differ from their predecessors not only the increased clock rates and increased (in older versions) number of compute cores. At the Core i9-9900K, Core i7-9700K and Core i5-9600K also changed the internal termoenergetyczny material laid between the semiconductor crystal of the CPU and the CPU cover. In all three models is the polymer thermal paste now use metal solders with much higher conductivity.

The appearance of solder at fosmidomycin – partly as a necessary if not an efficient thermal interface, Core i9-9900K and Core i7-9700K would not be able to take those frequencies that are promised to them turbo because of banal overheating. The same six-core Core i5-9600K got the solder out of inertia, and it is in this processor, the positive impact of thermal interface with high conductivity can be seen more clearly.

To illustrate, we carried out a simple experiment: compare temperatures and energy consumption Core i5-8600K and Core i5-9600K when configuring them on the same frequencies with the same supply voltage. The results are presented below: the tables below show the limit value virtually measured temperature and energy consumption of CPU when checking stability in the stress test Prime95 29.4 (six strand under full load Small FFT AVX c). The cooling of the processors during the test was carried out the same air cooler Noctua NH-U14S.

Core i5-8600K:

Core i5-9600K:

The results allow to make several conclusions in relation to the semiconductor crystal Lake Coffee Refresh and a new internal thermal interface. But first and foremost catches the eye is the fact that, despite the use for the production of processors, Coffee Lake Coffee Lake and Refresh the same process technology 14 nm++, as newer semiconductor crystals has really improved. It is expressed in that the Core i5-9600K is able to take the same frequency as Core i5-8600K, at a lower voltage.

At the same time, the new six-core processor with a design Refresh Coffee Lake shows ceteris paribus the higher power consumption. If you select the same voltage and frequency of the Core i5-9600K consumes 15-25% more power compared to the Core i5-8600K that is obviously due to the increased size and complexity of the underlying semiconductor crystal.

However, increased power consumption and heat generation Core i5-9600K to the growth temperature does not. On the contrary, new shestiyadernik is prone to functioning in a more benign temperature conditions. At equal voltage and frequency of Core i5-9600K is about two to three degrees cooler than its predecessor. But if to compare between a state with roughly the same power consumption and heat dissipation, the advantage of the representative of the family of Coffee Lake Coffee Lake Refresh before they reach the level of 10-15 degrees. That is exactly what manifests the positive impact of the new thermal interface: it allows to cool the CPU crystal is more efficient than before, when Intel used solder, thermal compound and the polymer. And this, in turn, enables Core i5-9600K to work without overheating at a much higher heat dissipation.

In the end, the advantage in temperature entails and the best acceleration. As follows from experimental data, the frequency of the Core i5-9600K manages to raise about 100 MHz higher than Core i5-8600K. However, this advantage can hardly be considered some special success. High heat dissipation Core i5-9600K, originally built on an eight-semiconductor crystal, almost completely negates the entire gain in the temperatures derived from the solder. Overall, therefore, no special overclocking achievements from the new shestiyadernik is not expected. And moreover, it seems that the best results in overclocking you can achieve all the same Core i5-8600K if pre-scalp.

#Acceleration

If you carefully read the preceding section, you probably know that you can count on some epic overclocking Core i5-9600K clearly not worth it. So, the maximum frequency at which our instance of processor was able to work steadily and to undergo stress testing, steel 5.0 GHz. Performance in this mode was achieved when setting the VCORE in the range from 1.25 to 1.28 In with the inclusion of the penultimate level Load-Line Calibration.

As you can see from the above screenshot, more serious overclocking is due to high energy consumption and heat dissipation Core i5-9600K. If you raise the voltage above 1.28 is In, the temperature of the CPU cores goes straight out of bounds, causing the throttle. But if the tension leaving at this level, for frequencies above 5.0 GHz the processor does not pass the test on the stability in the stress test Prime 29.4 (Small FFT with AVX).

Nevertheless, Core i5-9600K accelerates still better than all eight Coffee Lake Refresh that have passed through our hands before. The previously tested Core i9-9900K and Core i7-9700K overclocked reached frequency of about 4.8 GHz, and this allows to conclude that reducing the number of active cores in the Core i5-9600K slightly lowered his dissipation and increased frequency potential. But this is still not enough to Core i5-9600K it would be possible to calculate more advantageous alternative for overclocking Core i5-8600K. The difference within the overclocking of these processors are not as essential, while the classic Coffee, Lake in the reserve there is a hidden reserve: it at desire it is possible to scalp.

In addition, when overclocking Core i5-9600K unusually large attention should be paid to cooling. The dissipation of this processor when overclocking is not less than fosmidomycin, and to remove and dissipate more than 200 watts only the chosen coolers with high efficiency. For example, in the experiments we used the super-cooler Noctua NH-U14S, and rely on the cooling system less efficient, we would not recommend it. Much in overclocking Core i5-9600K depends on the quality of the implementation of the power Converter on the motherboard, which should provide a stable voltage with a significant increase in current. Unfortunately, on the market of motherboards meet this requirement, not all products even the ones that are relatively expensive.

This time we overclocked the processor without lowering the multiplier in the performance of AVX-instructions. However, as in the case with the older Coffee Lake Refresh, setting a negative 200-megagertsevym Delta for CPU frequency when working with AVX instructions would allow to obtain higher performance in applications that do not use vector data. In other words, the frequency of 5.2 GHz when you work exclusively when working with 32 – bit and 64-bit scalar data for Core i5-9600K quite real.

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With the release of the desktop Core processors, the ninth generation, Intel was finally able convincingly to answer his age-old rival, began deliveries to mass market chips with eight cores. Innovations in the face of the Core i9-9900K and Core i7-9700K immediately appeared in the center of attention, but largely not for the most obvious reason. At the fore is not so much a discussion of the advantages of these processors before senior Ryzen how pricing and availability is to buy the Intel fosmidomycin at the prices close to the recommended, today is simply unrealistic.

However, no matter how many complained about the high cost of ordinary people, staunch supporters of Intel is not stopping. If we talk about the capabilities and performance of the language of facts, in addition to increased to eight the number of cores older Core thousandth of a series of bribery and high nominal frequencies. As a result, their performance is certainly higher than the older mass Ryzen processors and Core i7 past generations. So it seems that Core i9-9900K and Core i7-9700K – a kind of uber-processors, which not only has no equal in the mass segment, but also who will hold the position of flagship in the foreseeable future, becoming a sort of Islands of stability in a changing world desktop where the paradigm shift and transition from chetyrehjadernogo to cosmedent has just happened in the last couple of years.

As for the cost, today the youngest of those of fosmidomycin, Core i7-9700K, already can be considered as an option for the top-level configurations. Of course, the price of 35 thousand rubles at the officially announced value of $374 it is difficult to call humane, but at least against the prices of older graphics cards family GeForce RTX this amount does not cause complete rejection. So it is not surprising that buyers on Core i7-9700K are, and, as experience shows, it is sufficient.

And I must say that those who are not waiting for the cheaper Core i9-9900K, and takes Core i7-9700K right now, it is possible to understand. Considering all the pros and cons, we cannot say that the flagship of the family Core i9 by far the better of his brother with a lower positioning. The fundamental difference between Core i7-9700K is the lack of support for Hyper-Threading, but due to the nature of the technology used to perform two independent flows of resources of a single computing core, many modern games and applications not only benefit from growth, but often on the contrary, suffer from it. In addition, according to the latest news, Hyper-Threading is a serious problem in the security system, and some developers are even calling for its complete shutdown. Therefore, the configuration built on the younger inalaska osmeteria latest generation Core i7-9700K – quite good option, which is not ashamed to recommend how to work a computer, and for “maximum” gaming build.

In this article we decided to discuss in detail how the owners of the systems built for Core i7-9700K, can further “improve” their platform. We will focus on acceleration. One of the key features Core thousandth of the series was the return of Intel to use between the heat-dissipating cover and the CPU crystal beshlyaga solder with high thermal conductivity.

For this reason, many were waiting for new fosmidomycin another step forward in the part of overclocking potential. But there it was: generation Refresh Coffee Lake was very hot even without any overclocking and, as shown by the initial testing, and so they operate at frequencies close to the limit.

However, we decided to go back to overclocking the Core i7-9700K again. This time we turned to our long-time partner, computer store,”regard“, and took for testing multiple serial processors. With their help, we have tried to establish as far as possible to raise the performance of the platform on the basis of the usual Junior intelestage of osmeteria, if we approach the question carefully and systematically. And as a result we were able to deduce the algorithm that, in spite of all obstacles, allows you to overclock average retail Core i7-9700K to “beautiful” rate of 5 GHz.

#Core i7-9700K: characteristics and features

So, Core i7-9700K – it is the most affordable desktop Intel CPU with eight cores. Its price is set at $374, and from the point of view of formal positioning it is between $ 500 osmeterium Core i9-9900K 262 and $ shestiyadernik Core i5-9600K. Like its relatives, this processor is the most modern version intelliscore 14-nm process with the conditional name “++ nm 14” and has an unlocked multiplier, theoretically allowing for easy overclocking. Like all other proposals for the platform LGA1151v2, Core i7-9700K is based on the microarchitecture Coffee Lake and has an integrated graphics core UHD 630 Graphics (GT2). Built-in dual channel memory controller of this CPU officially supports modes up to DDR4-2666 that no news is not, but at the same time he is able to address up to 128 GB of memory to install in the system will become possible after the advent of 32 GB DDR4 SDRAM. It should also be noted that in the Core i7-9700K appeared first hardware security patches Meltdown and L1TF (Foreshadow).

  Core i9-9900K Core i7-9700K Core i5-9600K
Code name Coffee Lake Refresh Coffee Lake Refresh Coffee Lake Refresh
Production technology 14++ nm 14++ nm 14++ nm
Socket LGA1151v2 LGA1151v2 LGA1151v2
Cores/Threads 8/16 8/8 6/6
Base frequency, GHz 3,6 3,6 3.7 V
Maximum frequency in turbo mode, GHz 5,0 4,9 4,6
L3 cache MB 16 12 9
TDP, watts 95 95 95
Memory support DDR4-2666 DDR4-2666 DDR4-2666
PCI Express 3.0 16 16 16
Graphics core UHD Graphics 630 UHD Graphics 630 UHD Graphics 630
Price (official) $488 $374 $262

Support Hyper-Threading technology have always been a mandatory attribute of the family of processors Core i7. But that was in the era of Quad-core and six-core CPU, when it allows such processors to process eight or twelve threads simultaneously. With the release of the Core i7-9700K everything changed: the virtual CPU number of cores does not support, but as the tests show, it is still in most cases significantly more productive Core i7-8700K, because the two additional physical cores able to make a greater contribution to performance in comparison with Hyper-Threading.

Like the Core i7-8700K, the new Core i7-9700K has a L3-cache and the volume of 12 MB. In other words, the amount of cache in terms of the core was reduced to 1.5 MB and this is another sign that the Junior OCTA core Coffee Lake Refresh differs from his older brother.

As the nominal clock frequency for the Core i7-9700K specified 3.6 GHz, which corresponds to the nameplate frequency Core i9-9900K and 100 MHz below the frequency of the Core i7-8700K. However, users in the assessment of consumer qualities have long been accustomed to look not at the nominal frequency, and the speed that is advertised to turbo mode. And it Core i7-9700K looks much more interesting 200-300 MHz surpassing the indicators defined for the Core i7-8700K. Unfortunately at 5.0 GHz under single threaded load Junior cosmedent still lacking, but nevertheless, at 4.6 GHz full load on all eight cores promise a very decent performance.

Base frequency, GHz Frequency in turbo mode, GHz
1 core 2 core 3 core 4 kernel 5 cores 6 cores 7 cores 8 cores
Core i9-9900K 3,6 5,0 5,0 4,8 4,8 4,7 4,7 4,7 4,7
Core i7-9700K 3,6 4,9 4,8 4,7 4,7 4,6 4,6 4,6 4,6
Core i7-8700K 3.7 V 4,7 4,6 4,4 4,4 4,3 4,3
Core i7-8086K 4,0 5,0 4,6 4,5 4,4 4,4 4,3

However, there is an important caveat, which is at the root of all change. Specification assumes that the operating frequency in turbo mode can increase only as long as the power consumption (and heat dissipation) of the processor remains within acceptable limits. These limits for those processors are defined three basic constants:

  • PL1 – limit processor power consumption, which should not be exceeded for long-term work;
  • PL2 is the peak processor power consumption, which should not be exceeded during short-term increase of the load;
  • Tau – the maximum time during which the power consumption of a processor is allowed to go beyond the PL1, remaining however below PL2.

Intel suggests that the PL1 limit should correspond to the thermal package of the processor, i.e. Core i7-9700K is 95 watts, while the limit PL2 is set to 120 W, and the time Tau during which the processor is allowed to consume more than 95 watts, but less than 120W, limited to 1 second. And it is very hard requirements, which severely restrict the frequency formula of the processor. That is, if we talk about the nominal specified antalovsky specification working mode Core i7-9700K, to accelerate to 4.6 GHz and higher it is able only in the case of quite light load. If we are talking about complex computational algorithms, the frequency determined by the parameters PL1 and PL2, are significantly below given in the table above highs.

As a simple illustration, we present the distribution of the real frequencies, which honestly is configured according to the specifications of Core i7-9700K when rendering in Blender using different numbers of compute cores.

As you can see, under heavy load, the achievement frequency of about 4.6 GHz is more the exception than the rule. High frequency close to the maximum allowed under the turbo mode, is achieved only under light load, when the power consumption of the processor does not cause any problems. In the case of load on all the cores the frequency is set closer to 4.2-4.3 GHz, that is by 300-400 MHz below the limit values. Naturally, the attainable frequency dependent on the nature executed by the processor algorithms, but the main thing here is that if you configure the CPU to be honest, the frequency formula Core i7-9700K, sandwiched within the 95-watt thermal package, looks not so great as it seems at first glance. But in this case, the consumption and dissipation of the processor really fit in the declared limits.

However what you can see in the graphs above is rather theoretical or even hypothetical situation. The fact is that in the pursuit of performance, motherboard manufacturers antalovsky specification is neglected. Into use long ago introduced the Multi-Core Enhancements, which negates all the requirements antalovsky specifications regarding the power consumption and heat dissipation, and outputs the processors to the maximum possible for a given load frequency. Formal language this means that the Board increase the threshold values PL1 and PL2 to unattainable in real life, and as a result, the processor gets the opportunity to work on unrestrained maximum frequency, depending only on the number of cores loaded with work.

Having exactly the same test Core i7-9700K when rendering in Blender with enabled Multi-Core Enhancements, you can observe quite a different picture frequency.

However, you need to understand that when the system is in this mode, neither of which is a 95-watt thermal package CPU it is not. Picture of real consumption begins to look like the following.

The conclusion from all this is quite simple. If you are going to use Core i7-9700K with the inclusion of Multi-Core Enhancements, the rated thermal package 95 W for you to absolutely nothing. In reality, the processor will consume up to 150 or even 200 watts, and the power supply and cooling system in this build you need to choose accordingly. Also, do not forget that Multi-Core Enhancements – a kind of acceleration, and guarantees long-term stable and trouble-free operation of the system in this mode, no one gives.

A little more about the practical part of this acceleration we will discuss in the next section. But before we get to the actual test results, a few words should be said about the processors that we tested. All the calculations made in this material is derived from testing five specimens of the serial Core i7-9700K series (FPO) L834F584.

The explanation of this marking allows to conclude that these processors are made in Malaysia at the end of August, that is two months late samples to the press that Intel offered for eight related innovations. And this means that all conclusions which will be made hereinafter, is absolutely relevant for students in the retail network, CPU.

#Overclocking Core i7-9700K enabling Multi-Core Enhancements

Through the efforts of motherboard makers feature Multi-Core Enhancements (MCE) is ubiquitous in common parlance and no longer perceived as a form of overclocking. However, it is this: MCE is the real acceleration, which switches the CPU to non-standard modes. Moreover, as we will show further practical examples, – acceleration in the case of Core i7-9700K hard enough.

The essence of MCE is that the processor when the operation is permitted not to follow their energy consumption and to achieve maximum possible under the turbo mode frequencies that depend only on one parameter – the number of busy cores. But if the Quad and partially shestidennomu such assumptions are not entailed any particular problems and had little or no consequences to obtain an additional performance boost, with Core i7-9700K not so simple. Devoid of any limitations on the power consumption OCTA core processor Refresh Coffee Lake are heated much stronger than the predecessors. This is not only because of the increased number of cores in the semiconductor chip, but also because they have a higher maximum permitted frequencies, the designated manufacturer of “arbitrary decision” without any preconditions in the form of improved process technology. And ultimately Core i7-9700K enabled MCE can consume electricity and, consequently, allocation heat two to two and a half times the amount specified in the spec of 95 watts.

This means that if you plan on a system with Core i7-9700K to use MCE, you should be sure to take care of a good motherboard with the powerful Converter power supply for high-quality cooling of the processor, which should be able to cope with the dissipation of over 200 watts of heat. We were convinced immediately when they began to check taken to test the processor in the nominal mode. Even a simple test of stability, Prime95 29.4 after enabling the MCE has become for them a problem. And despite the fact that for cooling we used a fairly productive ITS a Corsair Hydro Series H115i, temperature test osmeteria neared the maximum allowed.

The following table shows the results of the practical test five serial Core i7-9700K in Prime95 29.4 (full eight strand SmallFFT load c AVX) with active Multi-Core Enhancements.

Prime95 29.4
CPU instance VID, Max. the power consumption of the CPU, W Max. temperature, °C
The coldest core The hot core
1 Of 1.34 216 82 91
2 1,353 213 83 91
3 1,391 239 90 102
4 1,32 215 82 92
5 1,353 218 82 91

Obtained in the verification process, the results allow to make several conclusions. But the most important thing here is that a simple on MCE immediately translates Core i7-9700K in close to the limit mode. Moreover, some instances Core i7-9700K (as number 3 in our test), after you enable the MCE can even go beyond the maximum permissible temperature and to reduce the operating frequency because of the inclusion of a protection mechanism against overheating above 100 degrees – throttle. Moreover, recall that we performed the test with an efficient liquid cooling system, and therefore, when using more than simple coolers overheating and trottling CPU will provide almost one hundred percent probability.

In addition, you need to pay attention to another feature. Uniform removal of heat from the extruded multicore crystal Lake Coffee Refresh – not an easy task even with the Intel transition on efficient internal thermal interface. So eight cores always present a considerable temperature differential between cores, which can reach 10-12 degrees.

Overclocking with enable MCE BIOS of the motherboard is one of the simplest approaches, which on the one hand allows to obtain a significant performance increase, and with another – does not require any tedious setup. Moreover, contrary to the recommendations of Intel, on most motherboards MCE is enabled by default, and the user need only be attentive to the organization of the cooling of the CPU and make sure that in the process, there are no signs of thermal trottling.

Forcibly enable or disable the function of MCE can be in the motherboard BIOS. Usually basic CPU settings in the BIOS the option is rendered as a separate paragraph.

To activate the MCE is possible, and another, more low-level way – manually increasing the consumption limits PL1 and PL2 to unrealistically high values. The settings of these variables usually are in the BIOS section, dedicated power management processor.

Similarly, the values of these parameters to their certified values, 95 W, 120 W and 1 from the processor to ensure that it will function as intended by Intel and not as I wanted the manufacturer of the motherboard.

#Overclocking Core i7-9700K manually

Overall, overclocking Core i7-9700K manually, instead of using the finished profile Multi-Core Enhancements, usually allows you to achieve more. However, due to the very high heat dissipation new eight-core processors, too much should not be expected. As practice shows, shestiyaderny Core i7-8700K accelerates better new products, especially if the procedure frequency to Preface the scalping and replacement of internal polymer interface on the liquid metal.

Thus, stable operation at a frequency of 5.0 GHz for Core i7-8700K not considered something out of the ordinary. But to disperse similarly Core i7-9700K almost unreal. To get this processor stable on 5.0 GHz only serious assumptions and indulgences in the criteria. The fact that the new processors Coffee Lake Refresh the internal thermal interface is used solder, not thermal grease, no special trump card of these processors is not. A better internal thermal interface only compensates for the increased dissipation of osmeteria but to some impressive frequency during acceleration it allows.

By itself, the process of overclocking Core i7-9700K fairly typical and is based on the usual algorithm: the increase of the supply voltage to increase the operating frequency – stability check. But, as in the case of all other processors, osmeterium has its own nuances, which we will discuss a little further.

Check five copies of the series Core i7-9700K allows us to conclude that in most cases, you should rely on overclocking the CPU up to a frequency of 4.8 GHz. Below we provide detailed information about the dispersal of all tested processors: data on modes in which stable operation is achieved and the limit values of temperature and energy during the passage of the test in Prime95 29.4 (full eight strand SmallFFT load c AVX).

Instance 1:

Instance 2:

Instance 3:

Instance 4:

Instance 5:

Indeed, experience shows that the average result of overclocking Core i7-9700K – proven stability is the frequency of 4.8 GHz. Thus, there may be processors that are capable of taking and a higher frequency, but at the same time, we ran and unsuccessful instance, the maximum acceleration for which was the frequency of 4.7 GHz.

The obtained results fit well to the statistics of shop Silicon Lottery, which is engaged in pre-sorting of the processors on a regular basis. According to him the frequency of 4.7 GHz take 100% of the instances of the Core i7-9700K, stable and working on 4.8 GHz 69 % of all processors, and the frequency of 4.9 GHz submits in 29 % of cases.

The best overclocking Core i7-9700K is achieved when the voltage V– CORE from 1.3 to 1.375 V. plays an Important role and set Load-Line Calibration (LLC) to counter the voltage drop with increasing current through the Converter power CPU. As practice shows, the greatest efficiency showing average levels LLC, when the CPU voltage at extreme loads is still slightly sags relative to the selected level. For example, ASUS motherboards with eight-step adjustable LLC recommended levels of Level 5 or Level 6, for ASRock boards – Level 2.

The best tool to check the stability of the Core i7-9700K today programme is 29.4 Prime95 in SmallFFT mode. Using mathematical algorithms and check for ease of Mersenne numbers, it creates very high computational load, which heats the CPU more than the most common common programs. And passing such a test allows to be sure that in everyday use overclocked CPU no incidents will not occur.

In the extreme case to a new generation Coffee Lake Refresh Intel has allowed to relax the requirements to the temperature of processor cores. The maximum heating for the 14-nm CPU crystal is considered to be 100 degrees, but Core i7-9700K enable temperature throttle you can now move on 10-15 degrees higher. For this purpose, the motherboard BIOS has a new setting.

To use this trick makes sense when you check the stability of the using specialized utilities that warm the processors obviously stronger than the regular program. For example, if the test in Prime95 will run without errors at temperatures slightly above 100 degrees, nothing wrong with that. In daily work such heating of the CPU, obviously, will not arise. That is why in some tests of processors on the dispersal we made the output of the temperature over the 100 degree limit.

Overclocking Core i7-9700K to 4.8 GHz seems pretty skoromniy result that only 4% improves the frequency, some turbo-mode to load on all cores. Is this the absolute maximum ability new consumer fosmidomycin? Actually no, if you remember that the utility is Prime95 29.4 actively uses 256-bit AVX vector instructions, and this factor causes a strong heating of the processor when using it. Such vector instructions is not all software, and especially do not add them into their products game developers. This knowledge allows certain assumptions to push the bar for maximum overclocking a bit further.

Like its predecessors, the Coffee Lake Refresh processors in case if executable algorithms contain AVX/AVX2 instructions, can reduce the clock frequency multiplier. This makes it possible to limit the CPU speed when dealing with demanding tasks, choose a higher frequency for the simple and ordinary modes. And as practice shows, at voltages VCORE range from 1.3 to 1.375 V At which achieved better overclocking results, the average Core i7-9700K, if we are not talking about the activation of the AVX/AVX2-blocks of the CPU to maintain stability on the 5.0 GHz frequency up.

To configure the dual-frequency mode is very simple. If we talk about the usual Core i7-9700K, error passing tests in Prime95 29.4 at a frequency of 4.8 GHz, the base frequency for this processor should select 5.0 GHz, by setting the AVX Instruction Core Ratio Negative Offset (from different manufacturers boards it is also known as the Offset Ratio AVX, AVX Offset or Offset CPU Ratio When Running AVX), which reduces the CPU multiplier in the performance of AVX/AVX2 code, ask the decreasing frequency of 200 MHz.

The decrease in the frequency of Core i7-9700K in the execution of AVX instructions on a 200 MHz can be considered a standard recommendation, allows to obtain better performance. However, the Delta 200 MHz is still not universal. For example, for the CPU 2, which could work stably in Prime95 29.4 at the frequency of 4.9 GHz, frequency without AVX we had to limit the same magnitude 5.0 GHz because of 5.1 GHz it was unstable. But overall it looks like typical dual-frequency acceleration for Core i7-9700K, which can the majority of instances, is a 5.0/4.8 GHz.

By the way, to check the stability of operation of the processor in modes without AVX can the same utility Prime95 29.4 – support vector instructions it is easily disabled by editing the configuration file local.txt.

It is believed that severe heat those processors without AVX load instructions do not exist, but the Core i7-9700K ready to break the stereotype. As shown in the screenshot above, this processor to 5.0 GHz even when ordinary operations may not warm up to 90 degrees and demonstrate higher power consumption 190 watts.

This is another compelling indication that before you embark on any experiments with overclocking the new those of osmeteria in the first place it is necessary to ensure sufficient power Converter power supply on the motherboard and good CPU cooling performance. From motherboards for overclocking LGA1151v2 OCTA-core processors, we suggest a model with a OCTA-core power Converter. And among the coolers is better to choose SVO with radiators, size 240 mm or more, or air supercooler with the design of the type “two-piece tower”.

SOURCE

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