CPU temp climbing until shutdown

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Michael Robinson

Honorable
Mar 14, 2013
24
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10,520
My PC (i3-3570k, standard clock, air cooled) has been running great for nearly 2 years but last night shutdown. Rebooting in safe mode produced the same result.

I checked the BIOS and it showed the CPU temp climbing by a degree every couple of seconds even at idle. The CPU fan was spinning well (2140rpm). The cooler looked clean and free from dust. The CPU temp climbed to about 75C at idle and then shut down.

I tried replacing the CMOS battery and reseting the BIOS settings but this didn't help.

Ideas?
 
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Michael Robinson

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Mar 14, 2013
24
0
10,520
I'll try that. Does the paste require a remover and does that come with the new paste? Does thermal paste just suddenly go bad like that though? after just a few years? I have other computers that are literally decades old and still going strong.
 
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Michael Robinson

Honorable
Mar 14, 2013
24
0
10,520
I had a few pennies in the account so figured I might as well replace the cooler at the same time and bought myself a H55 water cooler. What a PITA to install - the instruction manual is for 3 different types of system and is written in umpteen languages and the codes referred to in the manual are written in tiny black writing on a black background. Finally got everything attached and now the PC won't even POST now ! Grrrrrr

I should of followed your advice and just changed the thermal paste.
 
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Michael Robinson

Honorable
Mar 14, 2013
24
0
10,520
Finally got it working after taking everything apart and adding back one piece at a time. It turned out to be a lose connection on the motherboard. In all honesty, I think I'd just replace the thermal paste if I had the same issue again. The water cooler is fine but it's noisier than the stock air cooler and, seeing as I'm not overclocking, the improved cooling isn't much of an advantage. Anyway, it's one thing I wanted to try off my list.
 
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weberdarren97

Glorious
Aug 10, 2015
8,137
6
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The fan on the H55 is crap... That's most of the reason why it's noisy.

How about this one?

I can explain why it's quieter... Here is a Noctua article on the subject of fan acoustics. Yes, the fan I linked is three phase. Anyway, there's more to it's silence operation than just its motor. The blades are fatter and there's less room between them, meaning that it can move more air at a lower RPM, resulting in a quieter fan. These kinds of fans are called static pressure fans. However, the fan on your H55 is an airflow fan.

Simply put, airflow fans move air faster when there are no obstructions, but suffer when there's an obstacle like a radiator. Static pressure fans don't move air as quickly when there are no obstructions, but they don't suffer nearly as much when obstructions are present. Airflow fans are good case fans, static pressure fans are good radiator fans.

Here's a video on airflow vs static pressure by my favorite YouTuber, JayzTwoCents.
 
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