![]() Then you said 3 pin fan can still be hooked to a 4 pin header on mb. 4 pin fan has 1 more pin for PWM control. Many boards have the ability to control both on there own. ![]() Which one is best? PWM is better in most scenario's You can hook a 3 Pin fan to a 4 Pin header and not have issues. 1 wire Power +, 1 wire Negative -, 1 wire Tachometer. ![]() 1 wire Power, 1 wire Negative, 1 wire Tachometer, 1 wire PWM control.ĭC fans have 3 pin connectors. PWM fans have 4 pin connectors due to the necessary electronics on in the fan. PWM = Pulse Width Modulation, meaning the power pulses to the fan saving electricity and lowering the Electro Magnetic field that coil winding's, located in all fans and electric motors, produce.ĭC in this case means direct current where the fans receive a constant flow of electricity to remain spinning.
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