said by BlitzenZeus:
A cheaper option would be to use the onboard video if you have one since you would only use one monitor while gaming.
That's what I do with three monitors and Windows 7, and it works great. My GTX460 handles two monitors, and onboard graphics does the third. Last night I was playing a game, watching NFL, and doing voice chat. The Intel HD3000 video built in to the core i5 processor is more than adequate for the third monitor.
I do recall I had some trouble getting the third monitor to work. I had to enable onboard graphics in the BIOS, install the driver, and make sure "Intel HD Graphics Family" appeared in device manager.