Basically what is going wrong is the screen shakes, horizontal lines, sometimes color changes to purple while playing certain games. I can't seem to figure it out. I'm using 2 Geforce Gtx760 Twin Frozr's connected with sli.
I've tested different cables, Dvi-I, Dvi-D, Hdmi, tried running just one card in the first pci slot, then the other, then the same for the second slot. Nothing seems to be solving the problem. Could it just be that the drivers don't work well? I have the most up to date version through Nvidia.
Another coincidence that i've noticed is that it only seems to happen while playing League of Legends/Walking Dead, or games with more of a cell shade or cartoon look. Played all of Dead Space 3 at max settings with no shaking of any kind.