Heatsink Thermal Compound 5 g Silver Color

The surface of a CPU or a heatsink is never entirely flat; if you place a heatsink directly on a CPU, there will be tiny (invisible) gaps between the two. Since air conducts heat poorly, these gaps have a very negative effect on the heat transfer. Therefore, an interface material with a high thermal conductivity is needed to fill these gaps, and thus improve heat conductivity between CPU and heatsink.