Whether or not you will be able to have true surround sound is dependent on what motherboard you have. Older boards may require an add-in sound card. The software (driver) in modern boards will allow multi-channel sound. In newer boards, this can be by SPDIF, (Optical out,) which would need to go to a home theater receiver.
Newer boards also have more "re-taskable" standard mini-jacks to support direct connection to multiple computer type speakers.
But basically, if your board says it has 5.1 or 7.1 channel sound, then the correct software is supplied on the driver disc that came with the board. OR.....can be acquired from the board manufacturers website.