The size of the CPU fan is divided into three main models: 60, 70 and 80. The size of the division is mainly based on the length of the square frame of the CPU fan.
Bearing type: According to the different bearings, CPU fans can be divided into three categories: plain bearings, ball + plain bearings and double ball bearings. Among the three types of bearings, plain bearings have the lowest noise, but have the shortest lifespan and are more affected by the environment. Double ball bearings are noisier, but have a longer life span and a simpler production process, making them the mainstream now.
Direction of air: According to the direction of the CPU fan can be divided into axial flow and centrifugal type.
Number of blades: The blades of a CPU fan are usually between 6 and 12 blades. The smaller the number of blades, the greater the wind speed, but the operation of the noise is also greater; while the opposite is true for a larger number of blades.
Blade shape: CPU fans come in sickle, trapezoid, and AVC's patented folded-edge shape.
Expanded Information:
Principle of CPU Fans:
The main performance of a fan is reflected in the following aspects: rotational speed, shape of the fan blades, angle of the fan blades, and bearing system. Generally, the speed of the fan is indicated on the manual of the cooler. Generally speaking, 30% of the cooling effect of a radiator depends on the speed of the fan. However, the higher the fan speed, the better.
The correct fan speed should be based on the CPU's heat output, different specifications of the fan speed selection should be differentiated, the basic principle is: under the premise of generating the same amount of air volume, the larger the fan speed should be lower, the noise will also be less, generally between 3500 rpm and 5200 rpm is more in line with the conventional speed.