"220V Cooling Fan" fan speed and power are inextricably linked, the speed directly affects the size of the size of the fan power. Usually we think, in a certain range, the higher the fan speed, it is transferred to the air intake, the greater the amount of CPU, CPU cooling effect obtained will be better. But once the fan speed than its nominal value, then the "220V Cooling Fan" under prolonged overload when working in itself will generate heat, the heat generated by the longer the greater the fan not only can not play at this time to a good cooling effect, it will "fuel"; In addition, the fan at high speed during operation, it may have a very strong noise, a long time may be shortened "220V Cooling Fan" life; there, the more high speed of operation, need more power to provide "power source", and the high power source is available from the motherboard and power supply in the high power, motherboard and power supply at overload power will often cause system instability ??? Therefore, we in the selection of fan speed, CPU heat should be based on a decision, the best choice go to the fan speed of 3,500 between 5200 revolution.