I'm getting a Matrox RT.X100 Xtreme Pro, also I had plans to get the P5AD2 Premium/Deluxe motherboard. Those motherboards have onboard High Def audio. Does anybody know if it supports DirectSound capabilities? I need to know this because Matrox says what kind of sound cards are compatible with the RT.X100 Xtreme Pro and they must have DirectSound support. Or should I go with a separate sound card?