Although Geforce 6 and 7 have shader model 3.0 support, most games using HDR only support Windows 2000 and above. When I play Phantasy Star Universe with X850XT on Windows 2000, I can enable AA by renaming the program's name to bioshock.exe. But GeForce 7 can't use AA because the game will force antialiasing off, and only GeForce 8 and above can bypass the limitation by using nHancer. Besides, X8xx cards support component video output up to 1080i, and 6800 cards only support S-Video out.