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 have a problem with my PC on win7 64bit. My specs: i7 3770k with a MB asus PZ77 V LE and a custom fan cooler master Hyper 212

I know that this is a recurring problem, but so far i was not able to spot the right solution

  • everything works correctly, correct temperatures, etc
  • when I shut down the computer, win7 closes but the cooler master fan keeps running forever and I am forced to long-press the power button to shut it off.
  • i tried to look into the bios settings but i did not find anything...
  • EDIT: i booted in safe mode and the PC does NOT shut off correcly: it freezes on the closing animation window and I need to long press the power button to shut it down
  • EDIT: the disk where win7 is installed is a kingston ssd. i also have Intel Rapid Storage Technology that just crashes when I try to load it..

Do you have an idea? Many, many thanks in advance!

share|improve this question
Which fan (I'm guessing your cooler)? Where is it plugged in? – Journeyman Geek Jul 28 '13 at 10:02
yes the Cooler Master fan on the CPU – Noobie Jul 28 '13 at 10:03
Which fan port is it plugged into? Its still odd, but might help narrow things down – Journeyman Geek Jul 28 '13 at 10:15
thank you for your help. how can i find the port? – Noobie Jul 28 '13 at 10:17
Well, see where its plugged in, and read the teensy silkscreened print. It should be plugged into CPU fan, not CPU Alt, where where along the top/middle of your board – Journeyman Geek Jul 28 '13 at 10:19
up vote 0 down vote accepted

This can be hardware and software issue either. It is really hard to debug what is wrong, some of the possible reasons: PSU failure, BIOS error, motherboard or graphics card driver bug, etc...

By me this was cause by windows update, because it automatically updated the graphics card driver to a newer unstable version. Once a week I had small screen distortions, that's how I knew where to look for the problem... I updated the driver to an even newer version manually, restarted the computer and the problem was solved...

share|improve this answer

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.