What are the 4 wires on a PC fan?
What are the 4 wires on a PC fan? However, the 4-wire fan is a little different as it has the fourth 'control' wire to input a signal to the fan that commands it to speed up or speed down....4-wire fans explained.PINWIRE COLORFUNCTION1BlackGND (0V)2Yellow+12V3GreenSense/Tach4BlueControl/PWM Can you use a 4 pin fan on a 2 pin connector? Yes, the fan will work, but the speed of the fan won't be controlled by the motherboard because the voltage can't be controlled via just the two pins. Can you put a 4-pin fan into a 3 pin? FAQ: Can I run 4-pin PWM...