Hey, I'm new to the forum. I'm having some trouble with my new 5.1 speakers, and or my sound card. I'm pretty sure I never added a separate sound card, so I would assume that it is just running off my motherboard. I have six audio jacks in the back of my computer (excluding the ones located in the front, obviously) Those being: mic, input, output, rear, side, and sub. I think the problem is with my sound card, because I can get all the speakers to play if I plug each portion into my out jack. but when I plug anything into the sub, rear, or side jacks I get no audio at all. I'm wondering if 4-channel audio is something I would need to enable for my sound card, or if it would be an automatic thing. I wouldn't expect the jacks to be provided if they couldn't be utilized. But I cant find where that option would be if it does exist. Does anyone have any solution ideas? It would be much appreciated.