Originally Posted by doyll
This is with 3-pin fan and no adapter?
PWM control to a 3-pin fan supplies 12v to fan.. fan runs full speed. Only thing I can think of that would allow fan to change speed is if the PWM setting is actually an "automatic" setting that selects PWM control only if PWM lead is connected and working. When using 3-pin fan without PWM lead it uses voltage control.
Could you post a picture of how fan leads are connected to motherboard?
no this was with both fans connected to the Y adapter that came with the phantek
what it's come down to so far is that if I hook up 1 fan to CPU header (either one of the 2) it spins up just fine, regardless of how I have BIOS set up.
if I have both fans to the Y adapter to the CPU header, usually neither fan remain spinning after an initial burst when I press the power button. a few times one fan out of the 2 has remained spinning...this is if the fans are set to PWM. if they are set full speed (so speed control disabled in BIOS) then they both spin up at startup and remain spinning.
I can try each individual fan directly to the header without the adapter a bit later today.