"Tiny Cooling Fan" supply temperature will be lower, and you avoid the top of the chassis airflow dead zone exists. If you are under the power of the chassis, a large windmill fan from the chassis directly into the wind, the power will be very cool, it is conducive to stable power, long life, but dust will be relatively large; "Tiny Cooling Fan" Power will not be very cool , but it will not become cleaner. Some people like to set under a large windmill power anti-wear, are interested can try. For fanless power supply, the positive pressure in the air duct of the chassis, most of the heat will be discharged to the outside of the chassis; suction duct inside the chassis, most of the heat will be discharged to the chassis. And "Tiny Cooling Fan" power of a large number of openings chassis air duct design will bring some inconvenience, need special attention. Industrial cooling equipment must products, including mobile phones and now, too, the cooling effect is not good relatively easy to hang.