i have the ati 3870 in crossfire. the hd audio plays fine through my plasma speakers and i get a picture. however when i load up a game (gears of war in this case) the picture disappears and sound goes on the plasma screen, but stays on my pc monitor? so something wrong with the hd side of things i guess ? when playing films sound and picture is also ok, just when playing games anyone able to help solve 1 problem then another one crops up !