I race with a 7850 2Gb, that has been handling rF2 fine with a i5 3570k for a wee while now. Going back a few generations of cards, and they can still produce decent results. The thing I forgot to mention is that ISI might have an idea on where rF2 spends all it's processing power at it's disposal. I wouldn't think the graphical side of things isn't what is having a big impact on fps, but more the physics processing behind the scenes. They may have also been able to figure out that it won't give them as significant of a boost going to DX11, being that it won't be affecting those areas of the sim. The tyre and physics systems being so complex and processing intensive I wouldn't think will be sorted with DX11.