When you select "Mini Air Cooling Fan", except through the power of judging performance, but also pay attention to the special requirements of high power fan power supply, so as not work properly. In general, the rated voltage of 12V DC fan (used in computer cooling fans mostly belong to this category), an ordinary product does not exceed the maximum current 0.5A, a variety of motherboards can afford; and greater than this value, since the motherboard design reasons may not work properly on the part of the motherboard, we recommend using an external power supply; "Mini Air Cooling Fan" maximum current exceeds 1A, the general board are not properly driven, multi-interface directly with large 4pin power. A variety of "violence" of the fan power is not to be underestimated, the purchase should pay attention to power supply, an appropriate mix of adapter cable. Common 6cm "violent" "Mini Air Cooling Fan", the maximum current at 0.5A above all, 8cm "violence" fan maximum current exceeds the full 0.8A, 1A or more also are "normal."