I have a DELL 4600 (2.8GHz, 512MB), 17" LCD (E172FPb), GeForce FX5200 (128MB), SB1024. I am playing some games (not the latest gen, Neverwinter Nights for example) and I notice a lot of glitchiness, game hangups, sound clipping. I cannot figure out what the problem is. I have disabled the...