Exhaust fan surrounding hinder relatively much less, on the amount of wind is much larger than wind pressure requirements. At the same time, the heat inside the chassis can be more quickly discharged outside of the chassis. In addition, most of the chassis side and a top layer of thermal windows only punch mesh design, it is characterized by the use of wind capacity fan is a good choice. "Micro Cooling Fan" in the same cat fan, for example, just from the looks of it, P12 with respect to the previously mentioned S12B, the more moderate inclination and curvature of the blade, as well as a greater number of blade design, so that each blade the larger area exposed to the air, making the air stream at the same time by more. "Micro Cooling Fan" was loved by many players of NMB-B19 is also a fan in wind known products. Tilt angle blade from the appearance, most wind capacity fan blades have more and more relaxed as the number of features. For chassis heat also play a cooling effect, "Micro Cooling Fan" is not enough air flow will cause heat accumulation circulating inside the chassis.