I've got a small question. Whenever the video card is doing something, the front audio jack gets an increadibly irritating screech that can only be drouned out if I turn up the volume to an eardrum bursting level. Does anyone know how to reduce the interferance, or reduce the volume at the jack?
This has got somewhat rare nowadays. A decade ago it was the most normal thing in the world.
The GPU can produce a significant electromagnetic field, which can transmit to the sound card. The standard old remedy is to place your soundcard as far away from the video card as possible. Of course, in the age of onboard soundchips, onboard graphics chips and laptops, that remedy is only rarely applicable, but then again, the boards are constructed in a way that this shouldn't happen anyways.
So let's try to look at this more closely: You are saying that it only happens on the front audio jack. I assume therefore that it doesn't appear on the rear outlet.
Also, the screech does not gain in volume with the other sounds from the card. I'd say what you have here is good old cable interference (the kind that lets you listen to radio on your guitar amplifier if you use a crappy cable to hook it up). I'd guess that your front outlet is connected by cable to the board, and that this cable is insufficiently shielded and/or passes close to the video card. If that is the case, installing the cable in a way that it doesn't pass close to the video card should get rid of the problem...
If it's not the case, then the cable is just plain crap (no surprises there) and the video card probably pretty strong. In that case, you'll have to get a better cable, but for case-intern connectors this can be a real pain. You'd probably be left with letting someone make a custom one (or make one yourself if you're good enough with a soldering iron).