to TS:
basaha ang posts ni werty. if magbasa lang ka sa manual sa imo motherboard (the section regarding the onboard audio) makahibalo ka if possible ba nga maka provide na siya ug 5.1 or 7.1 output bisan ug 3 ra ang output slots.
and fineupgrade's "virtual surround system" is misleading. the 5.1 output that you'll be getting from your onboard audio (provided that the manual says that your onboard audio really supports 5.1 output) is discrete, and not virtual. the subwoofer channel (the .1 in 5.1 or 7.1) is non-directional, that is way gi-pair ni siya sa center channel mao kakuha gihapon ug discrete 5.1 audio output using 3 output slots.
bottomline, read the manual. and TS, unsa man diay motherboard nimo. asa man ani ang model sa imo Via HD onboard audio (
VIA Vinyl HD Audio Codecs - VIA Technologies, Inc.).