Under normal circumstances, "Micro Cooling Fan" The higher the rotational speed, the noise will be greater. If the non-prolonged abnormal noise, then the fan itself is not the problem. The reason that the fan noise after another, from the temperature-controlled cooling. When the CPU tasking frequently, the temperature will gradually, "Micro Cooling Fan" will take the initiative to enhance the speed, and thus play a cooling effect. Typically, the temperature hot summer, the fan speed relative after another. In this case, the user can try auxiliary cooling system, using laptop external convection air cooling, if possible in air-conditioned indoors, the effect will be better. In addition, when the user performs a large application or game, "Micro Cooling Fan" speed will be improved accordingly.