After a quick skim, so it makes the sound while the speakers are disconnected? And the drives as well? Is it a case/MB speaker? Is it a fan doing it? Next guess is power supply, but could be MB I ...
I'm using a Creative Live! (original, with digital outs) and the Cambridge Soundworks Digital 4.1 set (these are actually designed to be used together)<BR><BR>It only seems to happen in certain videos ...