Why Your Computer's Fan May Be So Loud (And How You Could Make It Quieter)

There's nothing more irritating than a noisy computer fan making a loud racket all day while you're trying to work or game. Here's some common solutions.
Ars Technica

Loud noise from CPU fan (I think)

There has been a loud whining noise coming from my computer for a while now. I <I>think</I> it is coming from the fan, but I am not sure. It could also be the power supply.<P>I want to test it somehow ...
Ars Technica

Why are my fans noisy??

And holy schmoly are these three fans noisy, by default! Note the case does NOT get hot IMO. The CPU runs below 30 degrees C at idle, and doesn't exceed 60 at load, with the H150i. I don't overclock ...
How-To Geek on MSN

Stop setting every top fan to exhaust: It might be choking your CPU

Another common mistake is omitting the rear fan. This fan is one of the most important in the system because it sits in the ...