Problem was/is that the Win 7 install didn't say "oh, I see you have a HD 3850 AGP.....let me dl a driver for you"...it simply said 'buggered if I know what you got....here....have a default vga driver and suck it up".
I was spoilt by/with its handling of my new machine's hardware.....but this card is supposedly the last/best AGP animal available....so you'd think if any older cards were to be supported then this would be the one.
There appear to be plenty of people having similar probs with the Saphire and Powercolor 3850s...in both Win 7 AND Vista.
Many of the 'solutions suggested' look like shots in the dark...with no real intelligent thought or logic....