High pitched noise

September 14, 2009 at 01:43:20
Specs: Windows Vista
So I just finished my first build a few weeks ago, and I've been having this persistent problem:

There's a high (HIGH) pitched whine coming from my speakers, headphones, external soundcard, and every other speaker I can hook up to it. It's definitely coming from the computer as I can hear almost the same tone coming from it without it being plugging into anything

I have a hunch it's the power supply, but I could be wrong. The reason I'm so mad about this is because I want to do recording with it.

Any help would be greatly appreciated. I've searched the web for hours


antec 1200
amd phenom II 955 BE
2x 4870's CF
Gigabyte 790fxt-ud5p
750w corsair whatever the main the one is

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September 14, 2009 at 09:56:22
Why would you build a crossfire gaming rig, then use it for recording? Open the case & try to pinpoint where the whining noise is coming from.

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September 14, 2009 at 10:25:36
"750w corsair whatever the main the one is"

Is that the power supply?

If it is, that's got more than enough capacity, but it has a load on it of about 87%, or possibly more.

"2x 4870's CF"

Minimum Power Requirement (for the system's PS) - 650 Watts

"amd phenom II 955 BE" - 125 watts

PSs CAN produce noise, but that's quite rare.
Do you have another PS, or can you borrow another PS, you can try? (650 watts minimum capacity for two 4870's; ~ 550 watts for one)

Are you using the onboard sound, or a sound card in a slot, or some other additional sound adapter connected to the computer?

You can use a sound adapter (e.g. a USB connected one) that is designed to bypass using the onboard sound, but I don't know whether it would pick up the high pitched sound or not.

If you're using a sound card in a slot, try installing it as far away as you can from other cards inside the case, or try removing it.

Is the high pitched sound only there after Windows has started to load while booting?
If yes, it's probably coming from, or because of, the video card(s), either because of the card itself, or because of the load it's placing on the power supply. In that case, if you have two cards, try installing one card at a time.
(I have worked on one dual boot system that generates a faint high pitched noise in XP but not in Vista - it seems to come from the video card itself - Visiontec HD AIW - Radeon 3650 - can't hear in the onboard sound output - it probably doesn't show up in recordings unless a mic is is used close to the computer).

Have you tried recording anything with other than a microphone close to the computer to see if the high pitched sound is picked up in the recording?

A computer can pick up sounds from it' s environment.
Don't use an audio cable from a CD or DVD drive connected to the sound adapter inside the case - you don't need it with modern drives - all sound can be produced via the data cable.
Route data cables as far as you can away from fans and the cards in the case.
Close up the case - the metal blocks a lot of stuff that would otherwise be picked up, or reduces it' s intensity.
Keep cables connected to the computer as far away as you can from anything that might generate sounds it can pick up.
- unshielded speakers (most ones for computers are shielded; most others are not)
- fluorescent or halogen lights (their ballast or transformer)
- motors
- monitors
- tvs
- phones
- power adapter cords, their transformers
- AC cords
- etc.

- the cable that connects you to the internet - coax or telephone.
- if it's a coax cable, it might have an iffy connector on the end of a cable, or a loose connection, or be connected to an iffy cable splitter, somewhere.
- if it's connected by a telephone cable, the cheap flat unshielded cables most people use act like an antenna - noise can be picked up from any phone cord connected to the same phone line that has the DSL or ADSL capability in the place you have the computer - you may get noise from other devices connected to the same phone line - all non-DSL or ADSL devices on the same phone line should have a DSL or ADSL filter between them and the wall jack.

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September 14, 2009 at 12:25:19
I've used my built in soundcard, and an external usb soundcard and even that picks it up which I don't understand at all. It shows up in recordings too. I like gaming but I wanted to record with this thing also. I can't even hook up speakers to it cause it goes through them too.

From all the reading I did it sounded like 750 was gonna be enough. I bought it off newegg so I'm not sure what their exchange is like. I wouldn't be opposed to picking up a 850 or perhaps even a 1000 just to keep it from making electrical noise and ground loop problems.

I have a coax cable but I reproduced the noise without the internet hooked up, and skipped my surge protector bar so it's the computer for sure.

I'll try taking out one of my video cards and see if that makes a difference, cause from the looks of it this definitely seems like a power supply issue so I'll post my findings

thanks for the help

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September 14, 2009 at 14:03:03
So after taking out one card it's still doing it, I have regular desktop speakers hooked up right now, I've tried studio monitors through RCA and it does it on headphones. It does this all through an external soundcard too which doesn't make any sense at all... that's the whole point of them

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September 14, 2009 at 14:24:58
The Corsair 750 watt PSs appear to be quality PSs, so if it's coming from the PS it's probably not typical of them.
I haven't had any sound related issues with the many Enermax PSs I've installed, however heavily they are loaded, if that's of any help.

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September 15, 2009 at 17:42:56
you could filter out the frequncy when recording
and just ignore the noise
how loud is it?

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September 16, 2009 at 19:10:42
it's too bad to be filtered out, no to mention it's there when I scroll around in explorer and mouse my mouse.

It's terrible

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