High pitch sound from computer

I've been struggling with the following for weeks. This is with Windows 7, 64-bit, and 2 gigs of memory.

I can be using the computer with no problems, and then try to play one of the graphic video games such as "Dirt2". As soon as the game starts, a high-pitch sound starts coming from the computer, very much like the kind of sound a computer makes if the memory is not working properly.

Here's what I have done so far:
Did a full check for any kind of virus - it's clean.
Did a long memory test - no problems.
Set the BIOS to default values. No help.
Tried leaving the anti-virus off. No help.
Installed the latest BIOS - no change
Tried a different user account - same as with mine.
Tried 2 gigs of a friend's memory - no change.
Replaced the GTX 280 video card with and 8800 GT - problem came back next day
Resource Monitor doesn't show anything unusual.
Event Viewer doesn't show anything unusual.

I have now installed "Core Temp 0.99.7" to see if it shows anything unusual (so far it hasn't). By this time tomorrow, I will have added on more memory so it has 4 gigs.

Usually, the computer doesn't make this sound, unless I start up one of the games that has a lot of graphics. However, a few days ago, the computer booted up twice, immediately making this sound. The third time it behaved properly, but I haven't yet tried it with the game.

I can post all the specific hardware I am using, if that would help.


First question - does anyone know of a graphics tester, which can take the computer to the limits, gradually, so maybe I can figure out under what circumstances this noise occurs?

Most importantly, any suggestions on what to try next?

Last question - is it "safe" to leave the computer running, while making this noise, so I can look around and try to figure things out?

I believe your CPU cooling fan is making this big sound.. As you computer needs more cooling....

Open up your CPU cabin, and start the game, observe which cooling fan is causing this issue.. probably there will be two fan, one is for your processor and another is for your cabinet..

Post back the results..

Done that, watched closely. The noise is not coming directly from a fan - it's not just a background sound, it is quite loud, and something inside the computer is definitely making it on purpose as some kind of "warning".

If you mean the fans aren't doing their job, that's why I installed the "Core Temp" program, to see if things are overheating. I don't think this is likely, as the noise happens too quickly - start the game, and the noise is there immediately, no waiting time for anything to heat up.

The computer has lot of fans right now - it has more holes than Swiss cheese, fans in front, top, and side, plus one on the Nvidia card, and the one on the CPU.

My friend who helped build the computer (I helped him, not the other way 'round) thinks that the noise is related to either a bad EVGA video card (but we've replaced that), a bad CPU, or a bad EVGA motherboard.

If you've ever started up a computer that did have a memory problem, and it started some kind of warning sound to tell you about it, that's what this sounds like to me.

Cut the power supply to the fan and try to use your computer for an hour, start the game and check if any random things happening..

If nothing happens we don't need the fan.. Probably we could change it...

This problem has been around for quite awhile. It seems that the coils on the MB vibrate when under load which causes the sound to be made. From what I read about this problem it's influenced by the power supply being used. About the only way to stop the noise is to change power supplies.

This problem has been talked about on many posts at the old EVGA forum. Apparently, the only thing that seemed to affect the noise was to use a different or higher output power supply. Sorry I can't help more but thats about all I know about this problem.

Another friend of mine has the exact same problem but he hasn't fixed it yet.

It could also be an overload warning from the PSU, which can happen if the PSU isn't up to par with the system. A game will make the system pull more from the PSU. If you take the side off your case, you should be able to tell where the noise is coming from directly, especially if it is the PSU.

Not to be funny, but that's some pretty good "guess work" without system specs listed. I say that because there was an issue with certain motherboards and power supplies causing coil hum. In fact, one power supply company wound up replacing the offending power supplies.

System specs would help tremendously here.

My two cents.

OP's system spec listing...

System Manufacturer/Model Number have several computers, not just one
OS Windows 7 64-bit

Sorry, just trying to help.

My system information file is 1.2 megs, and the size limit here is 1 meg.

I've attached the first part of the file. I can type in information myself, but maybe this is better?

Thanks for the advice so far - maybe it's just the power supply??