Performance
All tests were performed on the AMD Ryzen 9 7950X, so the top processor from the latest AMD series. Additional components contain the ASUS Crosshair X670E Gene motherboard, G.Skill Trident Z5 32GB DDR5-6800 CL34 memory kit and DeepCool 850W 80+ Gold PSU.
The mixed load test is a PCMark 10 pass, so a simulation of various popular applications used daily. The maximum load test is an AIDA64 Stability Test, run with CPU+FPU. It causes the maximum heat in calculations based on AVX instructions.
Let’s take a look at the results.
New processors run at high temperatures. The Ryzen 9 7950X is specified to work up to 95°C, and anything above will lower the maximum frequency. It doesn’t mean it will throttle, as the frequency will still be above what we can see in the general specifications, it will simply perform slightly worse. Considering that, you can see a 95°C on all the coolers in the comparison. However, there is a 150-200MHz difference between the 360 AIO coolers and the AK620 WH cooler.
The DeepCool AK620 WH could keep our processor at 5.05-5.15GHz during high load tests and was boosting up to 5.70GHz on single cores. This is about as high as AMD declares in the general specifications for the Ryzen 9 7950X processor.
The AK620 cooler performed well in all tests, giving us results not much worse than the AIO 360 coolers on average. The noise under high load was audible and louder than on the liquid coolers, but it was still quiet.
The maximum CPU boost was about 100-200MHz lower than that on the LH720 WH cooler, depending on the test. The maximum overclocking frequency was 100MHz lower, reaching 5300MHz at 1.25V. This result is outstanding, considering that in use was an air cooler. Below is a screenshot presenting the result in the Cinebench R23 benchmark.
Setting a 1.25V CPU voltage lets to achieve a higher all-core frequency than the automatic setting, which uses a significantly higher voltage range. An alternative way could be setting a Precision Boost Overdrive curve to -20/-30. However, this way, we would achieve a higher boost frequency and lower all-core frequency.
The AK620 WH is a well-performing cooler that combines excellent results with quiet work, regardless of whether we want to overclock the CPU.
