The chassis header is 4-pin PWM as per the manual, but it works both ways. The problem is that it doesn't modulate with temperature changes. I run Linux so Asus-ware is of no use to me.
Right now I'm using two resistors in series (Noctua ULNAs) which gets a 1200rpm fan down to 500, but some won't start. I'm thinking of using a PWM Y-splitter to control both fans form the CPU header.
Right now I'm using two resistors in series (Noctua ULNAs) which gets a 1200rpm fan down to 500, but some won't start. I'm thinking of using a PWM Y-splitter to control both fans form the CPU header.