The Radeon 9800 is capable of doing 3072 x 768 but for graphics only. Then it's running as a movie playback device, it will only support up to 2400 x 600. It was my mistake running the box with a 9800. When I swopped cards, it worked the way I was hoping. There were still some inconsistencies but I think that the 9800 needs to go in the trash.