/ Sign-up
Your question

4pin fan on motherboard with 3pin fan

  • Connection
  • Fan
  • Components
  • Motherboards
Last response: in Components
April 23, 2014 4:48:34 AM

Can I connect my 3 pin fan to a 4pin Chassis Fan Connector on my mobo? The diagram states from left to right.. Fan Speed Control, Fan Speed, 12V and Ground. Thanks.

More about : 4pin fan motherboard 3pin fan

April 23, 2014 4:50:22 AM

Yes that will work.
There is just one way you can mount it so it would fit :) 
The 4th Pin is basically just for command.

Best solution

a b V Motherboard
April 23, 2014 4:52:02 AM

As I understand it- a 4 pin fan uses PWM (pulse width modulation) to adjust speed, whereas a 3 pin fan uses variable voltage. It depends on your motherboard if it supports both or only PWM. If you connect your 3 pin fan to the 4 pin connector and the board *doesn't* support voltage regulation it will just run at full speed. If I were you I'd invest in a 4 pin fan.