Computer Case Fans that Keep Your CPU Cool
The CPU and the graphics card are the two units inside a computer that generate the most excess heat. Cooling fans do an excellent job of dissipating that heat, either by pushing cool air in or fanning out hot air from the computer case. Many other modern devices use the cooling abilities of the 40mm 12V fans. These fans are now integral parts of a wide range of electronics, including routing equipment and 3D printers. With standardized power demand and dimensions, the 40mm 12V fan among the most common cooling options available.
How to Select the Right Cooler
While they may appear the same, the 40mm 12V cooling fans can vary in performance. Metrics to look for include:
- RPM
- CFM
Rotation per minute or RPM is the most commonly associated metric with fans of all sizes, but it only depicts speed. While a high RPM in many cases can mean a more powerful fan, the fan's efficiency also depends on the number of blades, the shape of the blades as well as the construction of the fan itself.
Cubic Feet per Minute or CFM is a metric that expresses the quantity of air a cooling fan can move over time. Two fans can have the same RPM speed, but their CFM can number can be very different. Whenever possible opt for the model with higher CFM for more efficient cooling.
Do All 40mm 12V Cooling Fans Use the Same Power Plug?
The 40mm 12V cooling fan has been used for a very long time, so during the evolution of the fan PC, its connectors have changed. Among the models available you can easily find
- Two-wire connectors
- Three-wire connectors
- Four-wire connectors
The difference between them is in the use of low-frequency pulse-width modulation or PWM to control the fan speed. The four-wire connectors have a separate wire for PWM-drive input, while the other ones are designed to use PWM with various workarounds. As long as you match the number of wires available with the connector provided by the fan, there should be no compatibility issues.
How Do I Choose a Quiet Fan?
Cooling fan noise is expressed in Decibels or dBA. The dBA scale starts from zero and higher numbers mean that the noise generated is greater. Picking fans with lower dBA is a good way to ensure that you will get a quiet fan. An important thig to note is that ball bearing cooling fans are generally noisier than brushless fan models. Those who wish to find a 40mm 12V cooling fan that runs quietly should consider the brushless options. However, note that a ball bearing fan is usually more durable.