When I turn up my master volume and the headphones (when I play CS) allt he way up, I can hear a slight hissing noise in the background. I haven't tried to see if I cna hear it with my speakers all the way up, because I broke window once the subwoofer hit 80%, and windows are expensive . Anyways is this normal? I only hear it when they are plugged into the card directly, and only when it's at full volume. I don't know what kind it is so I can't help there, but it's more of a yes/no question then a "some cards" question.