Has anyone been able to control fan speed via the PWM header on this board? For the life of me I can't get ANY control over it whatsoever. I've tried Speedfan but that doesn't even seem to recognise a single fan I have connected to the board. The BIOS doesn't do anything either. I have x3 fans on a rad connected to the PWM (white) header (on a splitter), and I would like to set a speed range.