Hello,

I have a 3 monitor setup on a Radeon 5750 (XFX). 2 of my monitors go up to 1920X1080; one is hooked up with a DVI cable and the other with a Display Port cable, as the monitor natively supports Display Port functionality. My main display is 1920X1200, hooked up via DVI. I'd like to use all three monitors together, so I edited the FalloutPrefs.ini as follows:
bEnableEyefinity=1
resolution:
iSize W=5760
iSize H=1200
FOV:
fDefaultFOV=180.0000
HUD:
iSafeZoneXWide=770
iSafeZoneX=770

I also tried setting the H to 1080. Either way, I get an error saying this:
Failed to initialize renderer.
Your display doesn't support the selected resolution. Please set a different resolution in Fallout: New Veas's Launcher under 'Display Settings'.

Is this something that can be done? Am I doing something wrong or can I not use 3 monitors which do not perfectly match?

Any advice on this topic is absolutely appreciated.

I would think that the monitors would need to be the same size. try taking out the differently sized monitor and see if it will work that way. I don't know if it is possible to do multiple monitors at all actually.