Computer to surround sound

How can i hook my computer audio to surround sound? My sound is integrated (It has yellow, black, blue and the regular green outputs). I only use the green output now, so i don't know if the others work. Anyways, how would i get these to work with a 5.1 surround sound. I only have a RCA input (obviously dont want to use them thou), a coaxial and a optical. Thanks

What motherboard do you have? Make and model please.

unfortunately i have no idea. It came in a dell demension 4700. I wouldn't be surprised if the other ouptuts dont do anything.

ok, found an issue. I plugged my speakers into each of the other audio outputs and none work. There are not muted either. I guess only the green output works. ANyone have a solution for this?

ok, does anyone know how to hook a sound card to a surround sound? I got the audio working, so the yellow, black, and green outputs work. Now i just need to know how to get them to work with a surround sound with optical or coaxial inputs.