Buzzing sound when computer is Idle

moles · 21 Oct 2010 at 15:59

Here's a tricky one for all of you. Been driving me insane!

If my computer is sat idling then I get a constant buzzing sound from the case. Dont know what component as its hard to pinpoint. This will go away instantly if I do something. Even scrolling in firefox will stop the computer from idling and the sound will stop.

Also if I overclock the CPU in bios the buzzing goes away. I want to keep the system at stock though.

Specs:

Gigabyte ex58-ud5 mobo
i7 920 cpu
gtx 295 graphics
6gb crucial

Anyone had a similar issue?

moles · 21 Oct 2010 at 16:15

Im not sure if speedstep is enabled. Do I disable in BIOS?

It cant be the hard drive because the sound goes away when i overclock.

moles · 21 Oct 2010 at 16:59

right. I disabled speedstep and now the buzzing is gone. Strange thing is there is a faint beep everytime the hard drive is accessed when idle. Like every 1 or 2 seconds. Also CPU-z reports the multiplier changing even though speedstep has been disabled.

moles · 21 Oct 2010 at 17:02

scratch that. The buzzing is back

must have still been some background processes. The buzzing is now just as it was before. Might try a small overclock as Tealc suggested. Though still doesn't answer why its buzzing... A friend of mine has the exact same system. In fact it was a complete system bought from overclockers.

moles · 22 Oct 2010 at 09:25

Put the pc on a table and searched for the noise. It appears to be coming from the power supply which is a corsair hx620.