Trying to figure out Audio connections 5.1 speakers

[Drummer72j]

Hello,
I have a custom computer with mobo biostar mcp6p3 which has three mini plugs on back for audio plus two on the front of the case. I bought a 5.1 speakers system that has 6 RCA outs on the back. How or what do I need to connect these and get 5.1 on my computer.

 

[hunter315]

Your board only has stereo out, the pink is microphone in, the blue is line in, and the green is stereo audio out. Which speaker system did you get? If the audio runs into a sub/amp first it may split it to all the channels regardless and sort of fudge the surround sound, if not you will likely be restricted to 2.0 or 2.1 unless you get an add in sound card.