The noise in the headphones?

probably some crosstalk from the FSB (as I understand sound integrated) accordingly, any load on the tyre causes a change in the nature of interference. Try to not stick the integrated sound, I think the interference will disappear.

It was somewhere nearby. Disable CD line or something in the soundcard. If Windows and the Realtek sound, the headphones are not connect as headphones and as the front speakers. Realtek will not amplify the signal and these high frequency stuff will be less audible. I have them too, under Linux, but quieter. But I have them because headphones plugged into the front panel, and then the cable is unshielded. If you connect back.

Everyone is asked this question on the Internet.
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1) Check whether the lace from the CD-DVD device to the soundcard, if it matters.
2) If headphones are not connected directly to the soundcard, and output to the front panel — try to connect directly to the audio card.
3) Change the integrated audio on the external.

Actually quite a lot of solutions can be... cases everywhere unique.
He was faced with such a problem, but the truth was the difference. While flipping through the pages — the noise was varied.
Solved the problem replace the sound card for good audio interface... and I do not regret.
Although I think in most cases helped disable the MIC input... like he was radioactive.
But I strongly recommend to take that-thread type e-mu 0202... the difference in quality will experience badly. And problems will disappear... but of course if you are linuxoid :) because there are problems between the e-mu 0202 and linux...
The M-Audio delta 66, comp yuzaetsya as a media center with large outdoor speakers.

Computer grounded? :) Still could be the PSU, because the sound is not powered from the Converter to the motherboard, but directly from the PSU (via the connector on the Mat.Board)...

I have one just like it when I shake network with a speed of more than 5MB

On the sound card may have multiple inputs and multiple outputs. You can try to open the mixer and footcloth unused inputs/outputs of program. That is, put on some music, get in the mixer, all devices, disable everything except that which plays