I have asus mobo P5kpl in which I think I could play 5.1ch songs.do I need sound card for 5.1ch audio for this mobo. if this mobo is capable for 5.1ch then is there any need for sound card (for greater performance). now I also want to buy new system and buy new mobo - gigabyte GA-H87m-d3h . so will it work effectively as a 5.1ch sound card?