The 8th generation Core game's most powerful CPU is the i9 8950HK. The default high frequency, unlocked multiplier, and 12MB L3 cache are all her flagship features. Today, we will analyze the CPU's overclocking ability in combination with actual tests.
Like the i7 8850H/i7 8750H, the i9 8950HK is part of a 6-core, 12-thread, 45W standard voltage CPU sequence. The i9-8950HK default frequency is 2.9GHz, the single-core turbo 4.8GHz, the quad-core 4.5GHz, and the full-core 4.3GHz. The frequency is similar to the i7 8700K on the desktop. The single core is even higher, and the performance is unprecedentedly powerful. It is worth noting that the mobile 6-core i7 of the 8-generation standard CPU is equipped with a 9MB L3 cache. The i9 8950HK has a full 12MB capacity. Of course, the CPU's default TDP is only 45W. The MSI GT75 machine we got directly unlocked the 200W PL1 and PL2 power limitations.
GT75 8RG Machine Configuration GTX1080 +DDR4 2666 32GB
AIDA 64 information read
I9 8950HK Specification Information
We used the running sub-software, pager software and games to make a preliminary inspection of the default state of this CPU. The following conclusions can be drawn:
One: Even in the 9 heat pipes such as the MSI GT75 and the 10 hot pipe air-cooled molds, the i9 8950HK has a certain distance from the desktop i7 8700K whose performance is similar to the frequency. In the short run software, the two are not much different. , But for a long time, the i9 8950HK under the default voltage will be down-clocked in the full load application, lagging behind the desktop CPU.
The AVX 2 heavy-duty transcoding must be manually depressurized to maintain 4 GHz or it will be down-converted to 2.6-2.9 GHz
II: In the H265 transcoding and intensive load copying test represented by AVX 2, i9 8950HK cannot adhere to the default full-core Rui frequency. We borrow the command line script of the compression tool set for testing, and its operating frequency under AVX 2 load. About 2.6 to 2.9 GHz. In the AIDA 64 FPU, the running frequency of the i9 8950HK is about 3.6 GHz. In an ordinary application, depending on the load, the i9 8950HK default full-load frequency is between 4.15 and 4.3 GHz. Under the conditions, the strong cooling fan has no improvement in heat dissipation, and the full load is 98 degrees Celsius.
Regardless of whether the strong cold press is turned on, the frequency is 3.6-3.7GHz and the temperature is almost 95-98°C.
Three: Some foreign media indicated that the CPU's 4.8GHz single core Duo only takes effect when the temperature is lower than 50 degrees Celsius. We did not explicitly read this information, but we have never seen it near empty. This CPU has a Turbo frequency exceeding 4.6GHz. Its 0 load frequency is approximately between 4.35GHz and 4.55GHz.
Corona Benchmark Default Operating Status 4.16GHz
Four: In the large-scale 3D game like Far Cry 5, the i9 8950HK can stick to the 4.3GHz full-core core frequency. There is no problem. The default temperature is between 85 and 90 degrees Celsius. If the GT75 is turned cold, the temperature will be Drop to about 70 degrees Celsius, cooling effect is obvious.
Actual overclocking exploration process
Our main tool for overclocking is the Intel XTU official tool. She can provide a wealth of voltage regulation, Turbo frequency power and often adjust, and quick response under Windows, very convenient.
From the comparison of I7 7700K, i7 6700K desktop U and i7 7820HK, i7 6820HK in the past notebook dies, the default voltage of the LGA package CPU is very high, and the CPU temperature of the same voltage may be lower than the mobile BGA CPU. Overall speaking , LGA CPU in the notebook is not heat-resistant, BGA CPU neither pressure nor heat.
The i9 8950HK uses a 14nm process that is very similar to the i7 7820HK. Its frequency and voltage characteristics are basically the same. There is no difference between the performance of the i7 8950HK and the core. There are only two more cores. The i9 8950HK faces even more when the power wall is also broken. Severe temperature pressure. Our test process is basically a process of adjusting the CPU core voltage down from 1.2V, increasing the value of the Cpu Offset- voltage at the same time as the frequency is increased. This is because the voltage is higher than 1.15V after the i9. The 8950HK is getting more and more severe and the voltage is lower than 1.05V, so 4GHz is very difficult to stabilize.
Given that overclocking is over 43 times, downclocking is almost inevitable.
Extreme score setting 48 times frequency 1.19V Offset -0.175V
The ultimate score Cinebench R15 1514 points
The specific process of overclocking is relatively tedious and boring. We can directly conclude the overclocking for you as follows:
A: The 43-octave is not absolutely usable for the I9 8950HK default. When the AVX 2 heavy load is involved, the default voltage given by the system EC is too high. It will definitely be down-converted. Even if the intention is to lower the frequency, 4.3GHz will not be able to. Real application in AVX 2 transcoding. From this point of view, if the pursuit of i9 8950HK heavy-duty high-performance applications for a long time, overclocking is of no value at all, and grinding and buck is the right way.
II: If you use the game, the i9 8950HK can pull up a little bit of frequency when the voltage is moderately reduced (not less than 1.15V). In combination with the forced cooling mode, run a short-loaded test software or CPU utilization under ideal conditions. It is possible to do long-term operation in low-level games. Under this condition, the system is still not stable enough, but it can improve performance slightly.
Three: If you want to use the i9 8950HK to score, DIY overclocking enthusiasts can try to pull the full-core multiplier to 48, and find a suitable voltage to run the test software. By looking for the right voltage to get better looking scores In this condition, the voltage will be slightly higher than the above one, and the result will be slightly higher. The final result of our overclocking is 1.90V VID +Offest - 0.075V under the condition of setting 48 times frequency to get the result of Cinebench R15 1514. The results basically equaled the desktop R7 1700X, i7 6900K and other eight-core CPUs, but could not catch up to the i7 7820X's latest eight-core X299 platform CPU. This achievement has no practical significance.
I9 8950HK can be on the 4.8GHz? In the notebook without modification under the premise of the default is difficult, overclocking can see more than ten seconds. For 14nm Coffee Lake, laptop 6 core overclocking is too difficult.
