What is thermal grease primarily used for?

Thermal grease, also known as thermal paste or thermal compound, is primarily utilized to enhance thermal conductivity between the CPU and heat sink. This substance fills in the microscopic gaps and imperfections between the surfaces of the CPU and heat sink, ensuring that heat is transferred efficiently away from the processor. The improved thermal connection helps maintain optimal operating temperatures, preventing overheating and ensuring stable performance.

While some might consider the other options, they do not align with the primary function of thermal grease. For instance, it does not improve electrical conductivity, as that would require different properties not characteristic of thermal grease. Additionally, thermal grease does not serve to bind components together; rather, it is typically applied to existing surfaces without providing adhesion. Lastly, it does not cool down overheated components directly; instead, it facilitates the transfer of heat away from the CPU to a heat sink, which is then responsible for dissipating the heat into the surrounding air. Thus, the role of thermal grease is crucial in maintaining efficient thermal management in computing systems.