How to Choose a CPU Fan
Whenever your computer needs to perform calculations it relies on the central processing unit (CPU), often referred to simply as the processor. When the CPU is in operation it generates heat, so it must rely on computer components such as a CPU fan and heat sink combination to adequately dissipate the heat. Without a CPU fan the processor will quickly overheat and become useless. If your computer's CPU has been running too hot, choose a new CPU fan that provides better airflow.