Speakers putting out hissing sound on 3d

Problem:: The problem is that every time I run something remotely 3d or do anything that requires video, a hissing sound or some sort of sound anomaly is put out from my speakers. On Lattice(a OpenGL 3d screensaver on reallyslick.com) it's more of a squealing sound, however. When I scroll down up and down pages it makes a short and quiet zzz type of noise as it's scrolling. I've noticed that the CPU spikes everytime I do this and the temperature jacks up about 10 degrees C.

What I have done:Isolated the problem to the computer itself. It's not the speakers, I unplug them from the computer and it doesn't continue. As well as the fact that it only happens on 3d imagery. These are high end studio monitors(Behringer B2031A). I can't notice a sound actually coming from the computer itself. I've read some other forums and a lot of the responses suggests the problem was the PSU. I checked each of the components and I can't notice an odd sound coming from anything but the speakers. Checked to see if the CPU was spiking while it was happening and I noticed whenever 3d image was showing it jacked up to ~60% and the temp went up to about 50C(Cores). PC is currently overclocked to 3.7ghz so this is about right for the load. CPU idles at about 33C. Cores idle ~ 40C

Things ruled out:
- Nothing as of yet 4/23/2010 @ 9:16AM

Things tried
- Waiting
- Changing the sound card is a no go. Went from mobo sound to an audigy 2 pulled from a machine from my step father's shop.
- Unplugged the speakers, sound was gone.

Specs:
E8400 OC'd to 3.7ghz http://www.newegg.com/Product/Prod [...] 6819115037
Arctic Cooling fan. http://www.newegg.com/Product/Prod [...] 6835186134
4x1GB of Mushkin DDR800 http://www.newegg.com/Product/Prod [...] 6820146673
1TB Drive http://www.newegg.com/Product/Prod [...] 6822136284
SAPPHIRE 1GB 4870 http://www.newegg.com/Product/Prod [...] 6814102801
Gigabyte GA-EP35-DS3R http://www.newegg.com/Product/Prod [...] 6813128086
700W OCZ GameXStream http://www.newegg.com/Product/Prod [...] 6817341002

Any help would be appreciated!

Thanks

Forgot to mention. I've also done a lot to the computer in the past week. Like I mentioned I replaced the mobo sound with a sound card(Audigy 2.) I got the new speakers. I also RMA'd a stick of RAM so I have a new stick of ram in there.

Hmm, interesting. How are your speakers connected to the sound card - analog or SPDIF? Have you tried reducing the oc to see if the problem goes away? If you use analog cabling to the speaker amp, are they good quality, & properly shielded?

The audigy has its own onboard sound processor whereas the mobo probably relies on the CPU to do the processing. Since you have tried both, I doulbt it's the CPU. One thing you could try with the Audigy is to move it to a PCI slot as far away from the video card as possible, and make sure any inputs to it (DVD audio, etc) are also routed far away from the CPU & video card. Also try reseating all the cards to make sure they're firmly in the slot and all the way down.

Just one thing to clear up - you had the same problem with the mobo sound as well as the audigy? After re-reading your original post I couldn't tell for sure.

Anyway, I'd make sure all the audio & video drivers were up to date as well.