Heat Sink and Fan (HSF)
Definition - What does Heat Sink and Fan (HSF) mean?
Techopedia explains Heat Sink and Fan (HSF)
The heat sink is a thermal conductive material that quickly carries heat away from the processor. It is designed to have the greatest amount of surface area in a small volume of space, so aside from the flat contact surface the heat sink has many thin "fins" that facilitate heat dissipation through thermal convection, which means the heat is further carried away from the heat sink itself by air. Often the normal flow of air is not enough to allow for quick cooling, so a fan has to be added. Together, the HSF is the least expensive cooling solution available, with efficiency varying according to the heat sink design and fan power.