View Single Post
  #5 (permalink)  
Old November 20, 2011, 08:19 AM
Arinoth's Avatar
Arinoth Arinoth is offline
Join Date: May 2009
Location: Halifax
Posts: 9,217

No you cannot, unless you use a third party fan controller, you cannot speed control fans who only have 3 pins from your motherboard. Those 3 pins are 12V, GND, and Speed sense/RPM reader. The fourth pin which isn't included is the PWM pin, which is the pin that allows the motherboard to control the speed of the fan. Third party fan controllers can change the speed of 3 pin fans because they down volt the fan, causing it to run slower.
Here I am: here I remain
Reply With Quote