Can you plug a 3 pin fan into a 4 pin socket?
Apparently a 3-pin fan can plug directlyinto a 4-pin socket. Two of the pins providepower to the fan, the 3rd provides an RPM pulse to themotherboard to read the speed. The 4th pin is for PWM speedcontrol. If you plug a 4 pin fan into a 3 pinsocket, the fan speed will be controlled by voltage andit&...