I have 2 of these beast asus gtx680 dc2 4gb sli in a asus crosshair v formula-z 990fx motherboard with 8350fx amd and 16gb of ram 2133mhz and 1250 seasonic gold powersupply.
The problem is when I enable SLI I get direct x crash of any game I try. Borderlands2, cyris3, metro last light, bioshock infinte, battlefield3, etc. Now if I turn v sync on I can play cyris 3 but 99% of the I get reduced instead of increased frames rate and I get massive flickering. Almost like one of the cards is not keeping up. Now if I play in windowed mode I have no problem with any of the games. I have tryed just about everything and I am just about to give up and sell the cards on craiglist and get a dam titan or 780.
I have clean installed windows 8 3 times. I have even installed win 7 once. I have bought new sli bridges (4 different ones tryed). I have moved PCI express slots. I have tryed my old power supply corsair 750. I tryed different slots and new pci cables on the seasonic power supply. I have even rma'd the cards to asus.
Anyone have any idea before I give up and sell it and start a new gfx system. Thanks