1, air flow

Volume is the volume of air exhaust cooling fan per second, is one of the most important indexes to measure the heat capacity of heat radiation fan. Cooling fan air volume larger its heat capacity is better.

2, wind pressure

Fan wind pressure and wind are completely different concepts. Is relative. Pressure refers to the cooling fan for normal ventilation, need to overcome resistance in the fan ventilation stroke. Cooling fan air volume, air pressure is low. High pressure air is small. Large amount of wind can drive air flow in large numbers, but the air pressure is small, the wind will blow to the bottom of the radiator, the radiating effect is not good, the wind pressure air is small, there is no cold air enough with fins for heat exchange, the cooling effect is not good.

3, speed

Fan speed refers to the fan blade rotation times per minute, the unit is rpm. The more user-friendly.

4, the fan noise

The working noise of cooling fan is also very important index. General requirements for the noise of the fan should be as small as possible, and there is abnormal sound can not.