i9-14900k + Corsair H150i Link RGB, throttling at 100°C under stress test

[Kethav]

Hello, I've just installed a i9-14900k CPU with Corsair 6000mhz Ddr5 and Corsair AIO liquid cooler H150i RGB LINK 360mm conected to CPU_Fan header of an Asus Strix Z790F Gaming wifi II motherboard.

Fan config is 3x120 pushing out heat from top mounted radiator, 3x120 on front pulling fresh air and 1x120 back pushing air out of the case. All fans connected to Corsair LINK processing unit.

With just XMP enabled (and no other changes from the BIOS default settings) I get the CPU throttling at 100'C under Intel stress test.
I pretty confident cooling mounting is ok so I'm concerned by such high temp.

When using Windows11 normally, the CPU temp is around 40'C with 22'C in the room.

Is there something in the BIOS I can do to fix the issue or to understand which could be the problem?

Other specs:
Case is a Cooler Master TD500 mesh V2.
2x M.2 Samsung 980 Pro 1T
2x SATA3 4TB

Power supply Corsair Hx1000i
Graphics MSI NVIDIA 3060Ti 8G

[n_scott_pearson]

Well, you can make the fan speed response more aggressive. Remember that you are reliant on the motherboard's fan speed response curves even when using liquid cooling systems.

Hope this helps,

...S

[Kethav]

I already tried the most aggressive profile. And moreover when I'm in the BIOS, CPU temperature seems to slowly raise constantly. It was at 70°C after about 10 minutes. This to me is even more strange...

Anyway by enforcing Intel limits (from mobo settings) and downvolting CPU by 0.05V I gained -10°C of temp. So now under stress test it does not temp throttle and stay at 90°c Max. But now it does power throttle.... So I have to find out if I can avoid it also. .

[KrissyG]

With room temp at +20°C i get around 290W for few seconds only, then it keeps on dropping = this is normal.

Same reults with 2x 420 external radiators, each about 45mm thick, also exactly the same results with a MO-RA3 420.
I get no thermal throttling if i set TDP to max 230W.

What is not normal, is that in BIOS the temp is getting up to +70°C. Are you sure there is no air trapped in the radiator?
Rising temperature over time with same load suggest that the radiator is heating up and fans do not move any air through the radiator or there is not enough liquid to use all the surface of the radiator = passive cooling.



This here shows a stress test on default profile, where thermal throttling hits from the very first second,
it started with 290W and dropped quickly to 275W, test duration was less than 1 minute: 

[Kethav]

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