welcome to tomshardware.
Can you please describe your query in detail?
from what i can get, you are trying to configure a 5.1 speaker system and you need to know a motherboard that supports 5.1?
if that is the case.. then all new motherboards support 5.1 channel and most support 7.1
If you don't have 5.1 speakers, just go to the control panel audio settings and set it to plain stero or whatever speaker setup you have. The motherboard just dictates the maximum number of audio channels it can produce.