Focus on "Micro Cooling Fan" of the wind, which in turn is a selection dilemma. Air flow rate is an important objective measure of a fan of the chassis, which means that the number of cubic feet or fan sends air intake per minute, the unit is CFM. We can say that it resolution of the "Micro Cooling Fan" cooling effect. And the same noise, it is also a selection dilemma. Since the majority of fans on, the greater the amount of wind, cooling effect more ambition, but the noise increases. Therefore, we in the purchase, should be based on my needs and budget choices. But the general principle of "Micro Cooling Fan" is within the price range and noise can afford to give priority to those air volume of product Thinking.