Going to try to make this as simple as possible.
Config:
One EVGA 780 GTX SC Video Card - has 2 DVI, 1 HDMI, and 1 DisplayPort ports on it.
3 1920x1080 Monitors.
Issue:
Previously, I had 2 GTX 590's in SLI, and 4 DVI Ports to work with. All 3 monitors worked fine. Since switching to the GTX...