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How does a heat sink in a PC actually work?
Heatsinks are made of metal, usually aluminum or copper.
The heat from the CPU core is transferred to the metal heatsink which has fins, where the heat can quickly dissipate into the ambient air inside the case.
Having a fan blow on the heatsink speeds up the dissipation and having fans that blow out of the case (exhaust) remove the warm ambient air from the case and fans that blow into the case (intake) can replenish a cool air supply.
Like radiators for automobiles provide the cooling mechanism for the engine, heatsinks provide a cooling system for the processor.
Perth Cheer Squad at Metro City