Interface of chassis fan? (Not power fan, CPU fan, graphics fan) Please, thank you.

Chassis fan, in fact, is not essentially different from CPU fan, graphics card fan, power supply fan, etc. , but they are all powered by 12V voltage. At present, most fans used in computers are three-pin connectors, one ground wire, one 12V power cord and one speed measuring wire. The CPU fan may have a four-pin interface to support automatic speed regulation. Considering that the fan interface on the motherboard may not be enough, an adapter will be attached when you buy the fan, which can be directly plugged into the power D-head. (You should say 1 line× 4, hehe, two voltages are provided, the yellow line is 12V and the red line is 5v)-I just bought a fan from Taobao and put it on. Let me make some suggestions: just measure the side length of the fan. For example, the fan I bought is 8CM, and the "80" in front of the model "8025" means 8CM. Second, mine is an Intel machine. The original fan has four pins, which can cooperate with the motherboard for intelligent speed regulation. The general three-pin fan can only be externally connected to the governor, but it can also be used in the four-pin socket. Third, the speed of the fan is also an important indicator. The high-speed fan is close to more than 3000 rpm and close to 4000 rpm. Low-speed fans are less noisy. But in summer, I suggest using higher speed. When it is cold, connect a governor to slow down and reduce noise. = = = = = = = = = = Just find a chassis fan on Taobao. Look, the three-pin interface is a standard interface: Cool licensed alloy bearing Black Cyclone BRF-L 12 Chassis fan is a classic model BRF-L 12, which is inexpensive and has the same series. It is available in our shop. Index: size: 120 * 120 * 25 working voltage: 12v bearing: alloy bearing (patented by coolpad) input current: 0.32a (printed on the packaging box is wrong, and it is 0.4a) rotation speed: 2100rpm.