I've got the latest 8.0 drivers, but sadly I haven't really been able to test the card, because the day I got it I also decided to open up my pedals and fix them, which I shouldn't have done.
I managed to get in a couple of races before I f***** my pedals, it was quite an improvement. I did have one problem though, the game froze for several seconds, twice. One time in the pits and another going up the hill of Ashton, causing one or two people to crash. This never happened when I had the 5200 installed. I was told that it could have been caused by still having the 5200 drivers installed, hopefully that was the case...