Posted 11 January 2009 - 10:08 AM
He's correct, that was the thermal paste (grease).
It's a heat conducting paste.
It helps with the heat transfer from the processor, to the heatsink.
No matter how smooth the processor, and the heatsink look, there are imperfections on the surface.
The paste fills these imperfections, creating more surface area to conduct heat away from the processor.
The more heat removed, the cooler the processor runs, and the longer it lasts.
The paste should be applied as thinly as possible, as too much paste, will have the opposite effect.
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