Quote Originally Posted by Big.Wayne View Post
All the fans are three pin so I wonder why Q-Fan can't work its magic on the CPU fan?

I see it has a 4-pin header (PWM) connection but that should make the Q-Fan work a bit more accurately than a 3-pin, it shouldn't mean a 3-pin can't have its speeds adjusted at all?

Anyone got a 3-pin fan to work with Q-Fan on the CPU header?
Bad news, I'm afraid. The CPU fan can be controlled ONLY via the 4th pin. If you want to control the speed of your 3-pin CPU fan then you will have to connect it to one of the CHA-FAN 1, 2 or 3 connectors and set BIOS to ignore the CPU fan warning. This is how I am running the 120mm Noctua on my Scythe Ninja cooler. I haven't tried this with Q-fan running as I let Speedfan control it all.