Sorry to hear that gents, SLI for me is workng fine, no flashing, black&white, etc etc things for me....
Maybe you are not flying Window mode?
I have window mode 3072x1024 resolution with GRASS, ROAD, SHADOWS on or off but having TEXTURES at Medium and TREES to very little and x2AA.
Explanations and fps here:
http://forum.1cpublishing.eu/showthread.php?t=23199
Anyway, the day of the days has arrived
~S~