In summary, CPU cooling is a critical aspect of a functioning computer system that should be determined at an early stage in system design. Good airflow to heat generating components and adequate space and power for the cooling fan are critical design requirements for any system. One of the first steps in system design should be to estimate the required airflow. This will depend on the heat generated within the enclosure and the maximum temperature rise permitted. Many factors, including material, fin design, air velocity and surface treatment, will influence the thermal performance of a heatsink. Thermal imaging shows the highest temperature directly at the contact area between CPU and the heatsink and reveals a zone below the fan motor where there is a no flow condition. This is typical for all axial fans used in this type of application. Obstructions in the airflow path cause static pressure within the enclosure and should be minimized. The final system design should show a continuous airflow and optimal thermal management for all the heat generating components.