CPU chassis cooling fan is a widely used device, mainly used to cool computer cpus and related components. They are installed at various locations in the computer case and reduce the temperature inside the computer case by installing heat sinks on the fans to promote air flow. These fans usually have four connections, among which the TACH line reports the speed, and the PWM line controls the speed, so that the fan can achieve closed-loop control of the temperature and fan speed, improve the heat dissipation efficiency, reduce the power consumption of the host, and reduce the noise.

Different CPU chassis cooling fans have different designs and functions. For example, the early two-wire fan has no speed feedback and has potential heat dissipation problems, while the three-wire fan can detect the fan speed but cannot adjust the speed based on the actual temperature. The four-wire fan can realize closed-loop control of temperature and fan speed, improve heat dissipation efficiency, reduce power consumption of the host, and reduce noise.

When selecting a CPU chassis cooling fan, consider the following factors:

1. Fan size: The larger the fan size, the better the heat dissipation effect.

2. Fan speed: The higher the fan speed, the better the heat dissipation effect, but the noise will also increase.

3. Heat sink material: the better the heat sink material, the better the heat dissipation effect.

4. Fan noise: The lower the fan noise, the better the experience.

5. Fan brand: Choose a well-known brand of fans, quality and after-sales service is more guaranteed.

In short, the CPU case cooling fan is an indispensable device in the computer case, choose the right fan can effectively reduce the temperature in the computer case, improve the stability and life of the computer.