I am currently running an ATI X1900xtx for my game system on a C2D running at 3Ghz. I mostly play RTS games like C&C, World in Conflict, Supreme commander, etc and like tactical shooters like Far Cry, Ghost Recon, Rainbow 6 and am looking forward to the upcoming CRYSIS offering. I have dual 20" and dual 24" monitors that I use for my work here at home, but I would like to use them for a 3 monitor game setup. The plan is to purchase another matching 20" or 24" monitor. This would make my viewing area 5760*1200 for the 24" setup or 5040*1050 for the 20" setup.
That means I need at least 2 video cards. For a game like CRYSIS maybe 3 are required. I currently have an ASUS board that has 4 PCIE slots that runs at 8x per slot. Question is, what can I get away with to have smooth gameplay? I do not think SLI or Crossfire would work well here since I want to work with 3 monitors. BUT some games CAN be run in a window that I assume you could stretch over 3 monitors. I am not well versed in the capabilities of what SLI/Crossfire can do well under circumstances like this. But the amount of pixels to be pushed will be high.
1. try to pick up another X1900xtx
2. buy 3 new cards
--C. HD2950PRO (10.1 compatible)
--D. other cards or senarios
I love and prefer ATI for a number of reasons but am not locked into them. I use a number of monitors in my work so this machine would serve a dual purpose but the higher end video cards are NOT required in my line of work.
For multi monitor gaming you should looking to the TripleHead2Go from matrox. Its a break-out-box that you connect between your video card and your 3 monitors. Most games don't have native multi-monitor support, but Triplehead2Go apparently makes it easy.
Now since your running 3 times as many pixels on the 3 monitors you'll want the best video card you can get probably.
There are a coulple down falls to the TripleHead2go, such as the resolution isn't very high ... 3 X 1280 x 1024 so its 3840 x 1024 in total at 60 hz, 75 hz requires 1024*768... even lower. Also it only takes standard analog svga inputs.
Regardless of the negatives i think 3 monitors would kick @$$.