Thermal grease, also known as thermal paste or thermal compound, is a substance used to improve the thermal conductivity between two surfaces, typically between a microprocessor and a heat sink. The purpose of thermal grease is to fill in the microscopic gaps and imperfections on the surface of the microprocessor and the heat sink, which would otherwise create an insulating layer of air between the two surfaces.
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A quick reminder for you to replace the original thermal paste on your PS3 if you haven't done it yet. It may be like this. : r/PS3
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