2

Lately my CPU fan has been roaring along at 100%, and I'm having trouble figuring out why. It will, at one moment, be running quietly, and the next moment blazing at 100%. I haven't changed anything in the BIOS settings, nor have I installed any new hardware. The heatsink itself is not dirty, its got a little dust in it, but not enough to obstruct airflow. Using temperature monitors tells me that the CPU is hovering at a constant 26-29 C. Its strange because it's never done this before, and I'm worried that running it constantly at 100% will end up breaking it.

I can control the fan via SpeedFan, but my concern is that this might be a sign of a bigger problem. Any thoughts on this?

  • When that happens what does your CPU usage looks like? – Mxx Mar 8 '13 at 4:53
  • Did you consider the change in room temperature? Has there been a change in your usual room temperature in recent times? – Masroor Mar 8 '13 at 6:34
  • CPU usage doesn't look out of the ordinary for what I'm doing (just playing EVE Online), and I don't see any spikes or drops in CPU activity that coincide with anything that I'm doing, but I'm only using SpeedFan's built-in meter to test that. There haven't been any unusual changes in temperature, at least none that I can feel. – Enrico Tuvera Jr Mar 8 '13 at 13:28
1

I know from experience that there is a small delay between heavy CPU activity and CPU-fan activation. (the heat takes a while to built up) So check what process had a spike just BEFORE the fan kicked in. Second, is your CPU multi-core? then it's possible that the fan is responding to heavy load on ONE of the cores. EG: 12.50% for a process on an 8-core could mean it's using one of the cores at max.

  • The multi-core issue could be the origin, I agree. I suggest AIDA64 (aida64.com/downloads) (trial version available) for a better core-specific thermal measuring. – Sopalajo de Arrierez Jun 10 '14 at 22:19
0

This is usually due to thermal thresholds set in the BIOS or Intel/AMD desktop app. In my experience, unless you are doing crazy processing it is usually dust that clogs up the fan which you can fix with a can of compressed air.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

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