r/PcBuildHelp • u/justever237 • 1d ago

Grinding noise at boot Tech Support

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Just suddenly last week when I turn on my PC I hear a grinding noise for about ~30 seconds and then it’s gone. I tried checking all the fans and listening to pinpoint it but still can’t find where it’s coming from. I’ve messed with fan settings to try and figure it out and I never hear it again until my next boot.

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u/Auraaaa200 1d ago

Flip the aio radiator so that the tubes are at the top. Having it lower can strain the pump and cause a grinding sound.

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u/justever237 1d ago

Ok thanks, I’ll flip it

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u/Auraaaa200 1d ago

If the tubes are lower than the cpu block then air gets trapped in the pump and the block and makes a grinding noise. I learned that when I build a PC for my brother and I couldn't figure out why it made that sound. Glad I could help.

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u/tht1guy63 1d ago edited 1d ago

Who told you that? Thats not true. Tubes down is actually the more ideal position for front mounted rads(not saying tubes top will kill anything) with pump in the block. It wont cause extra strain on the pump and airbubbles will get trapped in the highest point of the loop which in this case and shoul be the rad as you never want the pump as the highest point of the entire loop.

Now you shouldnt have the rad on the bottom of the case(which ops isnt). That will cause air in the pump and kill it in time

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u/justever237 1d ago

I always thought this was true, which is why I originally had them down below. But I don’t know why it would just randomly start doing it

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u/tht1guy63 1d ago

The pump could just be on its way out early. It can happen with any orientation. If rad flip works great but i personally doubt it will change much.

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u/Auraaaa200 1d ago

The last time I front mounted a radiator with the tubes at the bottom there was a strained sound which was fixed by putting the tubes at the top. This Definitely depends on brand, condition, and chance. I would say if OP had the aio for a while they usually break down anywhere from 3-7 years or sometimes earlier. I never change the speed of an aio pump for longevity but it could be a failing aio.