Acutally I had clicked Span Displays with Surround and I am running 6082*1080. However the highest ROF goes is 4055*720
It sounds like the GPU scaling is what is messed up. Check the scaling options in NVidia's control panel. Sorry I'm not that familiar with NVidia's control panel with multimonitors...
- What DELL monitors would be best to use?
- How would 3 monitors plug in? (center = mini-HDMI + sides = both DVI slots)
- Would it be best ( would I have to) add another 580 for SLI ( so 3 monitors plug into DVI? )
I intend to buy 3 Dell 24" Ultrasharp U2412 monitors by next October or November unless anything else comes along that's better for a better price. From my reading, they are the best picture quality for the buck being an "eIPS" panel. I want the good off-angle viewing, LED backlit, native Displayport connectivity and low input lag.
With NVidia you HAVE to run SLI to have 3 displays. You'll need another 580.
I think most people with NVidia cards running 3 screens use the two DVI connections on the first card and the HDMI or another DVI on the second card. Also, some NVidia cards come with a Displayport or mini Displayport you could use instead of HDMI.
I'm running my 3 19" HP LCD displays from Displayport on the monitor to mini Displayport on the back of my ATI 2GB Eyefinity 6 5870 card via converter cables. The order you plug them in doesn't really matter as you can arrange them in the display driver software. I'm running CrossfireX (2 cards) but I don't
need to with ATI's technology. I just get better FPS with 3 screens running CrossfireX.

My bezel adjusted res is 4584x900.