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Old November 20, 2011, 09:15 AM
MegMind MegMind is offline
Join Date: Nov 2011
Posts: 7

My System Specs


Originally Posted by Arinoth View Post
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.
Thanks for the explanation but i'm aware of it.

What exactly is the benefit of motherboard 3 pin fan headers over the 4 pin molex connectors ??
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