Hello there...i have a GTX770 4GB where FANs not spinning, because PWM Pin is not supply anything. On Startup fans shortly spin up (0.5sec) and then stand still. set fan PWM to 100% with MSI afterburner shows 100% in GPU-z but still no PWM on pin. Also testet other Bios.

i have tries to track the trace from PWM 4-Pin fan connector, but can absolutly nothing find on PCB :-/ so i think the PWM signal comes straight from GPU...but is it possible?

GPU is working fine, no graphic issues, works also hours on benchmarks...all fine, except the Fan controlling

Hello! What is about the main buck controller at your board? Doues it have a PWM Controller feature?