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 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 above, which 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 two 360 AIO coolers and the air cooler.
The DeepCool LH720 WH could keep our processor at 5.20-5.25GHz during high load tests and was boosting up to 5.775GHz on single cores. This is more than expected as AMD declares up to 5.70GHz boost, so the CPU had perfect conditions.
Results on the DeepCool LH720 WH were nearly the same as on ASUS ROG Ryujin II 360 cooler. However, ASUS cooler costs over twice as much as DeepCool. Both coolers were also working at similar noise levels and let to overclock the CPU about the same. Differences in tests were at the edge of the error margin – +/- 1-2°C.
The AK620 cooler from DeepCool performed well, but the LH720, during high load tests and overclocking, let to run the Ryzen 9 7950X at about 100-200MHz higher, depending on the test.
Below is a 5400MHz result at all 16 CPU cores in Cinebench R23. The voltage was manually set to 1.27V. Lowering the voltage helps a lot to achieve better results in overclocking because of significantly lower wattage. At the same time, the voltage is still high enough to overclock the CPU. An alternative way could be setting a curve to -20/-30. However, this way, we would achieve a higher boost frequency and lower all-core frequency.
The LH720 WH cooler offers an amazing performance that will be hard to beat by other AIO liquid coolers. The next step would be custom water cooling, but its price will be much higher. Even competitive AIO coolers cost more than DeepCool products, so it’s hard not to be satisfied with the LH720 WH.
