Broken CPU Temperature?

December 22, 2011 at 05:33:10
Specs: Windows 7
Recently I decided to clean my computer and when I removed the CPU i saw that my paste needs a change so I took my computer to the pc tech and they changed it.Everything fine, my pc works great, but when I start playing a game for example (or just have high CPU usage) the CPU temperature goes MAD... SpeedFan shows 100+ celsius when i got HIGH cpu usage and the PC turns off eventually.I've run the following test: I started a game and SpeedFan and I noticed that the moment i minimize the game the temperature drops from like 100 degrees to 40 or something in just few seconds.I have put my finger on the heatsing and it wasnt hot at all.
I guess my problem is broken temperature sensors, so do u have any ideas how can i fix this?

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December 22, 2011 at 05:50:31
There was no reason to remove the heatsink/fan to clean it. A small brush & compressed air would have done the job. Thermal paste does NOT wear out, but once you break the bond by removing the heatsink, it MUST be completely removed & replaced. I can only guess that the "pc tech" did it incorrectly. Sensors are NOT the problem. Take it back & have it done right.

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December 22, 2011 at 08:06:16
I'd add that the fact that the heatsink wasn't hot at all confirms that analysis. It should be hot when the CPU is working hard otherwise it's not doing its job. The heatsink takes heat from the processor and gets hot in the process.

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December 22, 2011 at 12:16:27
The technician probably applied to much thermal paste.

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