GRAW 2, too bright to play......

Guys,

I wonder if anyone can help, I have GRAW2 and when I start a mission, the graphics are a bit messed up and seem very bright. Lots of large square blocks as well. Totally unplayable.......

GRAW plays super, no problems at all, as does DDO, the only other game I have installed on my reasonably new build.....

Spec:
E6850
Asus Striker, latest 0603 BIOS (Just updated, memory issues, all fixed now!)
4*1Gb Corsair XMS2 (Quad matched)
2*8800 Gtx (162.22 Drivers) (Tried with/without SLI)
150Gb Raptor (Doubt it makes a difference?)
On Board Sound (As above)
Vista Ultimate 64-Bit

Getting the feeling that it's a conflict somewhere, anyone else anys uggestions?