I need to know about the one that is found between cpu and the cooler

noise

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Apr 27, 2012
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Thermal paste? You apply it between heat producing chips and their heatsinks in order to conduct heat between the two. Failure to apply thermal paste will lead to very, very poor performance of the heatsink and is very likely to burn the chip up.

Thermal paste degrades overtime and should be cleaned off and reapplied when cooling performance decreases.