24V DC Cooling Fan speed, the higher the better cooling?

Many people believe that "24V DC Cooling Fan" the higher the speed, then at the same time, the more heat away from the CPU, so the easier CPU cooling, that is not the case. If the fan speed to exceed its standard value, then the fan is running in a long time overload occurs, the heat away from the CPU than it generates heat during high-speed rotation is small, so the longer run time, the heat difference greater, so that high speed "24V DC Cooling Fan" not only can not play a very good cooling effect, but the CPU temperature dramatically; Moreover, the higher the fan speed, noise may occur during operation on the larger, the worst case might make a fan or CPU scrapped off; in addition, to get the "24V DC Cooling Fan" high-speed operation, there must be a greater source of power to provide power, and high power source is from the motherboard and power supply obtained in high power, motherboard and power supply in the overload will often cause system instability. Therefore, the higher the cooling fan speed the better argument is not valid.