If any one, by any chance, is running CRYSIS with 2x Radeon 3870 in crossfire mode...please share your experience with us!

I have installed crysis patch 1.1 , latest catalyst 7.12, vista 64 plus cf/sli hotfix, But I get y frame rate with a lot of droops! I think, based on rivatuner report the game plays a yu-yu game with 3d and 2d clocks. just look at this picture :





My rig :
2x 3870 sapphire
abit ip35 pro
core2 6320@ 2.8Ghz
2gb ddr2 1066