Skyer, I try not to be rude, but why don't you just read what people write to you? It seems you use this thread as write-only, not reading what we say. You ask for advice, and then do something else and post your experiences, and again ignore the replies. Try to read (slowly) what onebuck wrote about the stethoscope. You might have found the cause 3 days ago.

jlinkels

Hi,

Just use a plastic ruler as I suggested. You will localize the vibration via the ruler and your ear. As you get closer to the source, stronger the vibrations.

Just trying to localize with your ear then finite results cannot be achieved.

BTW, you may have pads, if so the pads will have to removed and use a good thermal compound. Please clean the heatsink & top of processor. If you leave anything then you will have problems. Do not scratch the heatsink.

HTH!

I was going to go with onebuck's suggestion, but...
Are there any small coils on the motherboard? If the ferrite formers are loose you may get the same sort of problem.
Have you got a long handled wooden spoon? You could use it instead of a stethoscope. The handle end on motherboard components, the spoon end in your ear. Honest, it works! I'd suggest a long screwdriver which is great for noises in car engines but not with live electrical components!!

Play Bonny!

2 members found this post helpful.

Hi,

I'm unsure about the ferrite beads causing the high pitch. Possible, yes but the mass is small. Drying electrolytics can cause noise issues but failure for sure in a short time. I'm leaning more to something mechanical, mountings or the like. That's why I would disconnect everything except the MB from power. Then search the local area for source, just using the ear can cause one not to localize. I can see the use of the spoon with the handle to pin point and the spoon end would have more surface to place near cheek bone & ear thus the means to locate the problem by isolation.

I like the spoon idea, I'll try that instead of a dowel. I've got a stethoscope but you never know when and if.

Yes, that is a old mechanics trick that I have used over the years on more than a tractor, truck or car.
Great to locate bearing or balance problems. When things are at resonance things can get a little wild.

Jlinkels: I skipped stethoscope method because I didn't have any ruler/etc. near, and left it for today. (You see I am replying by the way....). My problem actually is that I am not nationally English speaking, so I might not get you clearly sometimes. So sorry for causing you all headaches.

onebuck: Ok, so I finally got one stethoscope-like object, and did the method you suggested above. I can't feel almost no vibrations at all, and, they those which are there only come in "waves". (Noise is constant). Thanks much for heatsink cleaning tip, I did it and also applied thermal paste again, pc sounds more quiet. (Hovewer it's still not the "noise" which bothers me mostly).

Soadyheid: (Thanks for suggestion about spoon, found ruler in meantime.) I don't see no small coils on the motherboard, at least, not that big to see them.

Hi,

@OP What is the power supply specs: Manufacture, model & power?

You can size things for the system here: http://support.asus.com/PowerSupplyC...Language=en-us

Thanks for reply,
my PSU is Enermax PRO82+, 525W model. I am pretty sure it's not in power supply unit though.

oh wait wait, I solved it during writing this post. I am not sure where it actually was, rebuilt that computer from scratch, and now the noise is out clearly.

Thanks much to all you who participated, thread is now solved. (I'll add reason if I find it in time).

IMHO you are making a major meal of this.

Open the side of the pc, put a folded blanket or sweater beside it, and lift out power supply, hds. With any luck you can get your face close enough to figure our which side the noise is coming from. Keep lifting until you find it.

How loud are we talking about? Whispers? Snoring? Rock Band? What does it sound like?

@ onebuck
I don't mean ferrite beads, I mean ferrite cores or formers which are used as part of the DC smoothing or filtering circuitry. These days you might find them in the VCM (Processor Voltage control module) or DCDC converter circuitry. If the core is loose in the coils you may get a humm. You used to get a 50 cycle buzz in the old PSU transformers if there was an air gap between the ferrite or laminated E-core of the transformer and the 'I' section which 'closed' the magnetic loop. - as per your previous post. Modern switched PSUs have smaller transformers operating at around 400K Hertz fed from chopped rectified mains (or is it 400Hz? Hmmm... Possibly... Most humans can't hear above 25Khz, not old 'uns like me anyway!)

Glad it's fixed anyway SkyerSK!

Play Bonny!

@business_kid: I did same thing as you wrote. I can't locate problem now though, it's no longer there. I suppose it had something to do with CPU (or area near processor) or HSF. (It was only thing left in case, actually..). Thanks for help.

@Soadyheid: Yeah, I am really glad it's solved now. Thanks for help. By the way, seeing your previous post, you two have to have quite admirable skills. I am in second grade of high school (not sure how school system is done in your country, but I am studying since 6 years, and it's my 10th year in school), so especially in computers related topic it sounds mostly like hieroglyphs to me.

Hi,

I'm aware of the PSU Trx but it seemed you were speaking about the ferrite. My mis-read. Probably 400hz, if memory serves me. Yes, the cores could be a problem but converters are potted on most new MB. I thought about getting a picture of the OP ASUS MB and look around a bit.

OP had already ruled out the PSU. I was wondering about the PSU sizing as a potential problem that could cause switching problems with the control circuitry.

Looks like the OP solved the issue by disassemble and rebuild. Bet it was mechanical!

Heck, my hearing starts to roll off at 6500. All that time around noise damaging my ears. I get on my grand-kids all the time with those ear buds in and volume high enough that I can hear. So it is damaging their ears.