CPU @ 170C and shutting down...!

[katie279]

Hi folks,

Odd one - old CPU (Q6600) was running hot and shutting down a few months back, so yanked out the case and cleaned off and reapplied thermal paste. This seemed to radically reduce CPU temps back to normal ranges (ie 40-60C), however have noticed the same symptom has crept back recently and it's now shutting off when putting it under load (ie intensive CP activities like games, rendering etc).

I can do the same again, just seems strange behaviour and can't see why it's only lasting a few months - is there anything else that could be causing this?

HWMonitor reports the CPU Fan as running fine (2500rpm+), temp is 85C idle for CPU, Sys temp is 35C, SSD is 29C, GPU (GTX 970) is 40C - so feels system is reasonable....

Any ideas welcome before I yank out and silver paste again....!

 

[katie279]

Heh, you get my sense of something peculiar...!

Answering a few questions - no dafties things, eg leaving plastic etc - as per OP this has been in situ for about 7-8 years now and running much more sane temps.

And yes it is Celsius (350ish in Forum).

I'm not certain but I think 170C is the thermal hard shut off point for CPUs - don't think they'd shut at 100C etc unless something else triggering. Note this is correct temps so whilst 85C is clearly not normal, don't think any danger of damage at this point. 170c of course is different...!

Agree it could be a faulty temp setting - although odd it'd just start suddenly and certainly triggering the shut off regardless so problem remains.

Only other thing i can think is if the heatsink has become loose or isn't sitting tightly, might try swapping it out with another to remove that variable...

 

[katie279]

Indeed, replaced cooler and this seems to have fixed (think it must've been one of the pins on those awful intel stock coolers wasn't fixed in and it was not quite in contact or something...).

Either way, you know when you open the case, you might as well do some other tidying up, so I gave it a good clean out, then figured I might as well replace the motherboard, add a Ryzen 1700x and 32GB of ram .... You know... Just whilst tidying up and all that....

Runs much cooler now. All eight cores....