1, the air volume
Air volume is the volume of air "Micro Cooling Fan" discharged per second, is one of the most important indicators to measure the cooling capacity of the cooling fan. The larger amount of wind cooling fan its cooling capacity, the better.
     2, the pressure
"Micro Cooling Fan" pressure and air volume are completely different concepts. Also relative. Pressure refers to the normal cooling fan for ventilation, ventilation fans need to overcome resistance within the stroke. Cooling fan air volume, air pressure will be low. High pressure air volume is small. Large amount of wind can drive a lot of air flow, but the pressure is small, the wind can not blow the bottom of the radiator, the cooling effect is not good, big pressure of the air volume is small, there is not enough cold air for heat exchange with the heat sink, heat ineffective.
     3. Speed
Cooling fan speed is the number of revolutions per minute of the fan blades, the unit is rpm. This relatively easy to understand.
     4, fan noise
"Micro Cooling Fan" operating noise is also very important indicator. General requirements for the fan noise to be as small as possible, but can not exist different tone.