onyx64

From what you're saying it looks like you measure the efficiency of the cooling system from the cold plate on to the radiator and out. A good cooling system also takes into account the coverage of the cold plate on to the IHS. That would be the difference between prime95 shooting upto 95 or something lower, like 85, for eg. all else being equal. Clearly the bottleneck is the heat transfer between the IHS and the coldplate ;)

- No overclock. BIOS is set to defaults. - PBO is again the default on auto - Temperature of the coolant is always sub 40C. I wonder if the sensor is working at all - ambient is 23C, and air going into the rad is the same. - Yes i know CPU can throttle upon nearing thermal limit. But the whole point of having an efficient cooler is to not let it reach that state. - Prime95 is the ultimate heat test - similar to burn-in tests. It is a test that tells whether the AIO is capable of dissipating all the heat produced when the chip is working at TDP. This is not a question of intel vs AMD. This is a question of how good the AIO is for a CPU. All said and done, the H150i does not cover the entire IHS. It should NOT be advertised as an AIO cooler that supports threadripper.

Just installed the H150i PRO XT on the threadripper 3960x, and I am seeing temperatures hitting the 95C limit when running prime95 (Small FFTs, 48 threads). Although the "square plate" of the cooler doesnt cover the entire IHS, I dont expect it to hit the thermal limit, or reach near throttling (which is around 87) if the H150i is really meant for threadripper. Anyone have a threadripper 39xx + H150i combo that see this?