Everything SLI related is broken in FC4
My pc is 2600k, p67, 32gb 2133, 2x gtx 670, revodrive x2 100gb.
I play at 1440p, and many other games work fine with sli and I have a decent frame rate at maximum settings.
However, FC4 is another case.
In SLI, frame rate is high at 1440p maxed out settings, but:
SSBC causes ghosting, SMAA gives nothing, and HBAO+ gives a noticeable fps drop with gtx 670
SMAA causes ghosting, 2x MSAA gives nothing, and everything else give a huge fps drop with gtx 670
No depth of field effect (distance blur)
Also enabled non-nvidia Fur is blurry
Summed up, at previous version i was able to play at 1440p with maxed out settings, 2x MSAA and HBAO+ at 50-60fps.
Graphics were at least acceptable.
But now with the last patch game is unplayable. Yes, flickering. Going windowed and back helps for 10-15 minutes and then hello again, epilepsy and eye bleeding.
So, I tried running game on just one gtx 670, and oh god, the game is beautiful with working depth of field, SMAA and SSBC!
However, 30fps with just is unplayable.
I have a favor to ask, while you are looking into flickering problem, maybe you can also try and fix SSBC, SMAA, and other visuals for SLI?