Hello all,

my PC makes a very loud whirring noise when the CPU gets busy.

i.e. spyware search, flash player etc. I think it is the cooling fan (Lack of technical knowledge makes me UNSURE)

thanks for any help.

harrybean. Is it like a banging sound or tapping or something?
It could be the fan is loose or another part is loose and hitting the blades.Hello Carbon Dudeoxide,

thanks for your reply. no knocking or tapping just a loud whirring/humming that gets worse when the CPU is busy, when the CPU gets less busy the noise level comes down.


regards harrybean.I would look into replacing that CPU fan. MUCH cheaper than buying a new chip. Some of them can burn up literally in a few seconds.I believe this is normal for some computers. The CPU and/or other fans can RUN at variable RPM, depending on the workload. What make and model is your computer?

How old is your computer? Has this behavior changed recently or has it been consistent? Have you ever opened your computer to clean it on the inside? An accumulation of dust can have a negative impact on air floor and cooling. hello

i found this PROBLEM when i had made myslef a computer

my problem - the CPU fan wasn't getting enough air wich ment it was working faster and harder

this made the computer noticabley slower and much noisier

my fix - added a fan wich put air into the computer , this ment the CPU cooler had more air and wasnt working hard at all

Jasonthanks for help everyone,

i will try out you ideas, and get back to you.

harrybean.If you want to see how fast your fan is spinning and the TEMPERATURE of your hard disk, you can try this program called SpeedFan
Here is the link:
http://www.filehippo.com/download/767bc000c8c39925e06e0ca5b636eb48/download/

My fan spins at about 3150 RPM so you can compare if you want.