weird cpu fan sounds

[NeoGen]

I'm starting to worry now... :?
Since this morning that my cpu fan is making weird noises. Screeching sounds like if it's speeding up and then slowing down afterwards. It does this a few times, then stops and works normally, then starts again sometime later.

I've been looking at the fan speed and temp monitors and they don't change very much. At full load the cpu temp is constant at 50C and the fan is always between 2600 and 2700 rpm's.

I hope I don't wake up one morning with the cpu burned... :?

[Empty_5oul]

are you sure its nothing else e.g a case fan?

also check your wires, sometimes a sound cable or something (cable tie. etc) may be "flicking" against the fan creating these noises.

[Ototero]

Sounds to me like your fan bearing is on the way out.

The make it last a bit longer, lay the PC on it's side, remove the side cover, peel back the circular label on the fan.

Add a SMALL drop of oil in the centre (European spelling ) to smooth things along.

Look for a new fan within the next 2 or 3 months.

[Jeff]

What motherboard do you have?

[NeoGen]

An MSI KT3 Ultra-ARU (the one with the RAID controller onboard)

Great board in my oppinion. Can't do much on it for overclocking, but it has resisted all the torments I put it through everyday! :P

[Jeff]

Well, I have the Asus A8N deluxe board and I had some fan noise. Turns out to be the chipset fan. I navigated through Asus' website, which can be tricky, and reported my problem. They sent me a replacement fan.

Are you absolutely sure its your CPU fan?

[NeoGen]

Either that or the PSU, as they're both very close.

My little chipset fan never really worked, or if it did it was just in the beggining. And I really never bothered to fix/replace it (shame on me... :oops: lol) as I never had any problems with it being stopped.

The other larger fan is on the opposite end of the case, I'm sure the sound doesn't come from it.

[NeoGen]

Wait... after shutting down the machine for a little while and snooping inside, I found yet another fan that I was forgetting about, the GPU fan.

Might be it, as it was the only one that felt kind of hot when I touched. I spinned it a little and it seems to spin allright but I'll keep an eye on it.

[Empty_5oul]

if possible swap it out then you will really know.

otherwise try re-seating the card, possibly clean the fan aswell (i find a toothbrush to do the job best).

[NeoGen]

Yep, I'm sure now! It's the gpu fan!

I waited for it to happen again, with the case open this time, and it was clearly the gpu fan. The whole graphics card was shaking alot.

Oh well... now I gotta see where can I get one of those little fans for the gpu. Hope the local computer stores got them around...