i think he means the 3pin mobo header. <BR>That the ground on the mobo headers is tied to something (in this case PWM) and that might make the fan not run.<BR><BR>So if you want to run it 5v, the ...

I have a P5B Deluxe in my personal box running exclusively 3-pin fans for the CPU.<BR>There'd be no point to a connector plug for the 4th pin (which is PWM control), since the fan itself has no ...