Computer Fan Makes Excessive Noise

[Kevin]

Recently I noticed that from time to time, the electrical
buzz of my computer will increase in intensity from time
to time and then go back to normal, and I think it might
have something to do with the computer's fan. Has anyone
experienced something similar to this? I posted somewhere
else and they suggested that I should do error checking
and then run the defragmentor. Any thoughts?

 

[Sharon F]

Recently I noticed that from time to time, the electrical
buzz of my computer will increase in intensity from time
to time and then go back to normal, and I think it might
have something to do with the computer's fan. Has anyone
experienced something similar to this? I posted somewhere
else and they suggested that I should do error checking
and then run the defragmentor. Any thoughts?

A clump of dust caught in the blades of a fan could do this. Usually a good
cleaning will set it straght.

A variable speed fan may be noisier at one speed than another. If the
environment where the PC is located at has been a little warmer than usual,
you may be hearing that noise of the higher speeds. Noisy fans could also
mean worn fans that need replacing.

 

[Bee]

Recently I noticed that from time to time, the electrical
buzz of my computer will increase in intensity from time
to time and then go back to normal, and I think it might
have something to do with the computer's fan. Has anyone
experienced something similar to this? I posted somewhere
else and they suggested that I should do error checking
and then run the defragmentor. Any thoughts?

Because of the intermittent nature of the abnormal "electrical buzz", my
educated guess is that the fan speed electronic servo mechanism is faulty.
To see which fan is causing this noise, maybe you can start by eliminating
(or otherwise) first of all the case fans, by monitoring the fan speed
readouts in the CMS setting up screen.

Apart from clearing out some fluff, there is absolutely nothing else you can
do, or should attempt to do. The case fans are spinning at 50-100
revolutions per second.

Thankfully, fans, which have a finite working life, are cheap, and, as easy
to replace as changing a regular electric mains plug.

This is my thought as an enthusiast, not as an expert.