I'm running 3 screens (5760 x 1080) in 2D Surround Spanning and have added a 4th display (for my Lower EICAS) using the DP (with VGA adapter).

 

If I run in fullscreen mode (ALT, View, Fullscreen), the 4th display goes black.

 

When I was running the GTX275's in SLI, with the same Nvidia driver, I was able to stretch my display across all three displays and stay in windowed mode, and keep my lower display active. If I try and resize my screen beyond the size of the center screen (1920 x 1080) it won't now. If I pull it over to be in beween two displays and hit the top right window box to maximize, it snaps to the center screen and maximizes to 1920 x 1080.

 

I'm sure I messed something up when I dumped the drivers, changed to the GTX 680, and re-installed. Maybe some setting like, "Open ne programs in center screen only", but for the life of me I can't find it.

 

Any ideas?

Never mind, new driver load defaulted to the top menu bar having "maximize windows across all screens" unchecked.

If I run in fullscreen mode (ALT, View, Fullscreen), the 4th display goes black.

 

 

That forth monitor should work dispite going black.

Try dragging something on to it.

 

gb.