Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I connected videocard fan to SYS FAN on my mobo: ga-ma69g-s3h. Now it rotates all the time with full speed. I want to control it, for example with SpeedFan. Unfortunatelly I can't achieve that. When I change speed of any PWM fields simply nothing happen (only for CPU fan speed changing speed works fine). Do You have any suggestions how can I control speed of that fan?

share|improve this question

Many video card fans are controlled with voltage levels, not PWM. If it is the case with your card (which you did not specify) - you won't be able to control it from the motherboard

share|improve this answer
Maybe I wrote that not clearly. I connected fan that cools videocard to SYS FAN port on motherboard (videocard port is damaged). So in general that fan can cool something other to. Even if my videocard fan (port to fan) is controlled with voltage levels it doesn't matter because I don;t use that port. – Rob Apr 28 '13 at 20:04

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.