Question CPU Overheating at idle After GPU Upgrade

[BlackBolt84]

So I want to preface this by stating I had absolutely zero cooling issues before I replaced the CPU. I could play very intensive games and put the system under load, but my CPU would rarely crack 30% utilization and the core temps would be mid 60s, socket temps mid 40s.

Yesterday I removed my RTX 3080 and replaced it with a RX 7900 XT. After the install, during which I did not nudge, tap, hit, or otherwise touch my cooling system, the CPU core temps will hang out in the 70s with just a web browser open. Attempting to simply download DD2 off of steam spikes the CPU temps to nearly 100. CPU fan is constantly being shown at 100%. Socket temps are higher than normal, but not spiking like core. I don't really have any reason to believe that it's a thermal paste issue, as the CPU has been performing optimally under load right up until the install occurred. Interior of the case feels totally cool. GPU has never been put under load, so I've not yet seen the fans spinning on it. If they were, they exhaust away from the CPU.

At one point last night, I thought the whole system was fried, as it would give no video on boot and only RGB on hardware. I left it unplugged all night, popped out CMOS for about 8 minutes, and then I was able to get back to the desktop. Currently, I have it off again as the temps were climbing even faster than normal.

Is this a power thing? Is it a BIOS thing? I haven't overlocked the CPU or GPU at all, so I'm just struggling to find an answer here.


be quiet! Pure Base 500DX Case
AMD Ryzen 9 5900X Processor
ENERMAX LIQMAX III 360mm ARGB Liquid Cooler
32 GB DDR4 G.SKILL Trident Z
RX 7900 XT
MSI MPG B550 GAMING EDGE WIFI
750 Watt Corsair RM750

 

[Satan-IR]

You moved the case around and put it on its side to change, add and remove the graphics card.

If you're sure the AIO pump is working (vibration on CPU block perhaps?) See if you can hear rattling ro bubbling noise from the bump/block.

Might be an air bubble interfering with the AIO. You can try rotating the case gently in various directions 45 degrees or so while the pump is working to get rid of the air bubble.

 

[BlackBolt84]

You moved the case around and put it on its side to change, add and remove the graphics card.

If you're sure the AIO pump is working (vibration on CPU block perhaps?) See if you can hear rattling ro bubbling noise from the bump/block.

Might be an air bubble interfering with the AIO. You can try rotating the case gently in various directions 45 degrees or so while the pump is working to get rid of the air bubble.

I won't completely rule out that the AIO pump isn't running, but I definitely feel some vibration in the hoses while the system is on. I don't hear any sort of abnormal amount of noise coming from the case, in spite of the CPU fans running at 100%. I'll give the gentle rotation suggestion a shot!

 

[BlackBolt84]

You moved the case around and put it on its side to change, add and remove the graphics card.

If you're sure the AIO pump is working (vibration on CPU block perhaps?) See if you can hear rattling ro bubbling noise from the bump/block.

Might be an air bubble interfering with the AIO. You can try rotating the case gently in various directions 45 degrees or so while the pump is working to get rid of the air bubble.

It didn't seem to help, but now that I have the case sitting on top of my desk, open, and facing me, I can hear some bubbling sort of sounds coming from the AIO.

 

[Eximo]

Try turning it off and on again a few times and rotating the chassis through a few different angles while the system is running. Air bubbles in the pump is also not good for the bearing surfaces.

 

[Satan-IR]

I agree with what Eximo said. Put the pump profile on the maximum level of water movement whatever it may be called and gently rotate the case in various directions as the pump is working.

A tried way of pinpointing the source of noise in a PC chassis is to roll up a piece of paper (e.g. an A4 sheet) put one end to your ear and move the other end of the paper tube aiming at possible noise sources.

I can hear some bubbling sort of sounds coming from the AIO

A bubbling noise from the AIO and pump/water block makes the possiblity of an air bubble hindering cooling more likely.