Using ATI 5870 and I just updated to the 12.4 drivers.
My fps went from 30ish to over 60ish in the cockpit view
I still have to turn most ground settings on medium settings to keep the 5870 memory under 1GB
If the 1GB limit on my card was not holding me back, I think I could play on higher settings with nice fps still.
Do most of you have 2GB+ cards ? 1GB not enough it seems