Ryzen 7 7800X3D running 70C idle and 90C in games with an AIO

Posted by Low-Establishment455@reddit | buildapc | View on Reddit | 12 comments

Hi, as the title suggests, I’ve been experiencing some issues recently with high temperatures even at idle, despite using a 420mm AIO cooler (Corsair H170i, which I bought at the end of 2023).

Over the past two months, my PC has crashed twice, and I suspect it might be due to high temperatures, so I started looking into it more closely. I noticed that the coolant temperature rarely drops below 40°C, even when I set the pump and fans to maximum. While gaming, the coolant temperature stays around 47–50°C, and the CPU temperature reaches up to 90°C.

Today, I reapplied thermal paste and made sure the cooler was properly mounted, but it didn’t make any difference. Does anyone have any idea what this could be? Could it be a failing AIO or a lack of coolant in the loop? I’m not very experienced with this, so I’d really appreciate any advice — please keep in mind that I’m still learning and not very familiar with these things :)