Question CPU high temp on boot

Jan 28, 2021
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Just disassembled my entire pc, just to check a few things. Reassembled and in bios and my cpu temp is 80 degrees and rising on idle. Is it probably because there's still old thermal paste on my cpu? It sounds stupid but I just wanna make sure I didn't make any other mistakes.
 

pathos3727

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Sep 22, 2017
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Did you notice what the temp was before your disassembled?
Thermal paste should be cleaned off every time you remove the heatsink/fan/cooling solution from the top of the CPU. Then re-applied when you re-assemble.
It can be done with alcohol pads (after unplugging and de-energizing your PC) or something that doesn't leave behind a reside or fibers.
Q-tips and makeup-remover pads (not mine, lol)...with a dab of alcohol on them help take off the old paste very easily. And then clean it with a microfiber cloth to remove any reside or fibers. Blow it out with compressed air.
The old thermal paste, when you remove and re-assemble without cleaning/re-applying, can still have little air-bubbles in it that causes heat to not be transferred as easily and build up in certain areas. Which can cause what your describing.

Id remove the heatsink then clean the old paste (also notice the little indentations and uneven waves on the surface of the old paste, and any gaps)…….of course after disconnecting all cables from your computer and holding down your power button or a few seconds to disperse all the power.

Re-apply new paste.
And see if the issue still occurs.
 
Reactions: MafiaHabit
Jan 28, 2021
6
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10
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Gladly appreciated, I figured as much because before I disassembled, Everything was perfect. Afterwards I realized how much of a problem this was. Just gotta order new thermal paste through Amazon and should do it, And yes Alcohol with Q tips should do it.
 
Jan 28, 2021
6
0
10
0
Did you notice what the temp was before your disassembled?
Thermal paste should be cleaned off every time you remove the heatsink/fan/cooling solution from the top of the CPU. Then re-applied when you re-assemble.
It can be done with alcohol pads (after unplugging and de-energizing your PC) or something that doesn't leave behind a reside or fibers.
Q-tips and makeup-remover pads (not mine, lol)...with a dab of alcohol on them help take off the old paste very easily. And then clean it with a microfiber cloth to remove any reside or fibers. Blow it out with compressed air.
The old thermal paste, when you remove and re-assemble without cleaning/re-applying, can still have little air-bubbles in it that causes heat to not be transferred as easily and build up in certain areas. Which can cause what your describing.

Id remove the heatsink then clean the old paste (also notice the little indentations and uneven waves on the surface of the old paste, and any gaps)…….of course after disconnecting all cables from your computer and holding down your power button or a few seconds to disperse all the power.

Re-apply new paste.
And see if the issue still occurs.
Just reapplied thermal paste now it reached 75 degrees slowly from 20. What now?
 
Jan 28, 2021
6
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10
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Surprisingly now it worked as the stock intel coolers are a hassle to work with. You literally have to punch it to stick it in the motherboard.
 

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