After a few hours of running either Call of Duty or Battlefield Vietnam, my screen freezes without a blue screen of death and a high pitched but low volume whine emits from the speakers. My video card is an eVGA GeForce FX 5900SE and my sound card is an Audigy 2. I've paired the sound card with a PNY GeForce 4 Ti4400 without encountering this problem.
In troubleshooting, I've eliminated any IRQ sharing with the video card and have disabled AGP fast writes. Still, I have the same problem. I have not overclocked anything on my system. I have plenty of air circulation with 2 exhaust fans and 1 intake fan on the side panel blowing directly on the video card. Also, I have the latest official drivers from Creative and nVidia installed.
If I can remember correctly, when I set the graphic details to medium instead of high, the problem doesn't occur. Does this sound like some bad memory on the video card?