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

My chassis fan stopped spinning after a reinstall of Windows 7 32bit today. I did spend quite a bit of time trying to tweak power management settings, however I've reverted all to default and still I cannot get my chassis fan to work while in windows any longer.

Pre-reinstall, it worked fine, even when the computer was in sleep mode. Now, no longer. When I reboot, and BIOS has control of the board, the fan spins up. As soon as Windows loads, it shuts off. This is going to cause a huge problem as I've got a fanless video card (AMD HD 6450), which got up to 108C due to no moving air.

MB: Asus P8H67M-LE OS: Windows 7 Ultimate 32bit

Those are the only relevant pieces of info I can think of.

share|improve this question

migrated from Jul 20 '11 at 12:17

This question came from our site for system and network administrators.

could you try with a Linux (i.e. Ubuntu) live CD and see if the fan spins up? – tombull89 Jul 20 '11 at 8:06
Hold on, your chassis fan worked when in sleep mode? That is not normal behaviour. Also, by default, Windows 7 should not be managing any of your fans (AFAIK, no default drivers come with that ability). Have you installed any third-party (AKA non-Microsoft) drivers or applications since the format? – Breakthrough Jul 20 '11 at 14:42

Try to download a fan-speed managing software like: SpeedFan and check to see if you can force the FAN into working by tweaking the settings using that software.

If you still can't get it to work, you're goign to have to sift through the power-savings settings in Windows until you find where you disabled the fan. Also, make sure that you're running "Maximum Performance" mode all the time on a desktop machine.

share|improve this answer

Your Answer


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