Potential VRM overheating and suggestions

Apr 28, 2018
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Hello, I just upgraded my system to the current specs:

Case: NZXT H700i
CPU: 8700k
MB: ASUS Maximus X Code
RAM: 32GB Corsair Dominator Platinum @3200
GPU: ASUS Strix 1080ti
Cooler: Kraken x62

I have just delided my cpu and get get a potentially stable overclock of 5ghz at 1.35v at max temp of 75 degees C (so far). But I have noticed that after about 10-20 seconds into AIDA 64 or Realbench the clock will drop as far as 3400ghz. So far I have tried lowering the the overclock to 4.8 at 1.295v with a max temp around 60-62 degrees but about 30 seconds in it will drop to 4 ghz or lower. After reading around I'm assuming the culprit is the VRM overheating and throttling the speed. I'm currently running a fan setup of intake from the top and back with a push pull config radiator exhausting from the front and i have been testing with covers off to improve airflow.

I'm currently looking on solutions for better cooling or if this is an entirely different issue all together. My first idea was to remove the Plastic armor from around the vrm heatsink and/or add a fan somehow pushing air directly onto the VRM.

Any suggestions on this issue would be greatly appreciated, thank you.

 
I'm doubtful the VRMs are getting hot. These higher-end ASUS Z370 boards have cool running modern design VRM circuitry. Very minimal airflow should be all that's necessary. I don't feel that feeding the CPU 1.35v would be pulling enough power through them to cause any real concern. They are generally safe for normal operation to about 100C, but I read reviews on my Maximus X Hero only getting to the 60Cs or so when overclocked.

What settings have you used for your OC? Have you adjusted CPU Current Limit, ect?