Ocasionally after my PC has been on for a day or so I will start to get system beeps(i would describe the sound but ive got some themes going...probably not standard)...anyhow, im using Win 7 Pro x64, with the rig in my sig. Its not affecting performance(that I know of), its just annoying....not sure whats causing it, never had it before(and i was using Win 7 since Beta)....only occurs on this install, which is coincidentally the only upgrade ive ever done....maybe its something to do with the upgrade from WIn XP to Win 7 ??(i took advantage of the student discount).......