When I play games on this computer, I hear a very faint (although it is louder in WoW than anything else) buzzing noise, which changes tone and/or pitch depending on what is on the screen. I could only hear the buzzing sound when I used the Razer Barracuda HP-1 headset... as soon as I switched to a cheaper headset, I could no longer hear the sound. I've been reading around and the problem seems to happen mostly if you use onboard sound... but I have an Audigy 2 Value. I've tried moving the sound card in different PCI slots, which didn't help at all. The buzzing sound persists even if all sound is muted. If the computer doesn't even recognize the existence of my sound card, I can still hear the sound. Any ideas? Could it just be a defective headset? (The LEDs broke on arrival) Or do I need a fancier sound card?