HeHe
well, i have tried it with 9600, and HDR was working, but i was only getting like 4-7fps max, and was freezing all the time, so, i turned HDR off, and was getting about 7-10fps max, then turned 16XAF and 6XAA off, and was getting 20-30 fps.
20-30fps was recored when settings was on 1152x864, all high settings, no AF/AA, i belive that a card like a 6600gt or 9800xt or pro would be able to play HL2 Lost coast with HDR on.
i will now try half life 2 with 9600.
(X800XT PE at all max in half life 2: 60-250fps) 16XAF 6XAA---1280X1024---ALL SET TO HIGH
(9600NP at all max settings inc HDR, 15-50fps) 16XAF 6XAA---1280X1024---ALL SET TO HIGH
also, i belive that When you have downloaded lost coast, you can also have HDR in normal half life 2