In general, the rated voltage "24V DC Cooling Fan" (cooling fan are mostly used in computers such), general 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, it may not work properly on the part of the motherboard "24V DC Cooling Fan", recommends the use of an external power supply; 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 "violence" fan, the maximum current at 0.5A above all, 8cm "violent" "224V DC Cooling Fan" comprehensive than the maximum current is 0.8A, 1A or more also are "normal."