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CPU incorrectly reading temperature as -55C

Soldato
Joined
21 Oct 2002
Posts
3,008
Location
At home of course :p
Hi all,

This morning my PC powered itself off which it's never done before. I powered it on again, only for it to power itself off again shortly after making it into windows.

Recognising that these are symptoms of overheating, I powered on again but this time entered the bios, which told me the CPU temp was minus 55 degrees C, and I then saw 0 RPM on the CPU fan and realised the CPU fan wasn't spinning due to the CPU temperature being cold. Touching the CPU heatsink revealed it was scorching hot, so in the bios I adjusted the cpu fan to max which quickly cooled the cpu down.

I decided to do the good old fashioned full power down, so turned off the power at the PSU, waited a minute for residual power to dissipate, then turned back on. Computer is now back to normal and showing correct temps now for the CPU but wondering if this is a known bug, or whether anyone else has had this problem?

CPU is a Ryzen 3700x and Mobo is Gigabyte X570 Auros Pro.

Not sure whether this would be a CPU issue or a Motherboard issue - as in where the incorrect reading is coming from. I did review the release notes for the latest bioses on Gigabytes site but none of the changes mention this issue.
 
No - I did read the BIOS release notes and didn't see anything, but I'll update the bios anyway. I assume that updates the AGESA as well?
 
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