You'll probably be setting the resolution to 1280x720 (720P) as that is usually the resolution that is supported. I would say that 2 7900 GTXs is overkill for that resolution. I run this 7900GT at 1280x720 in every game (every game that supports widescreen that is) with all the highest settings. In FEAR I get an average FPS of around 65, maybe 70, and every other game runs flawlessly. I would recommend getting one 7900 GTX now if you really need to upgrade and getting a DX 10 card when they come down a bit in price. Or just buy one 8800GTS now if you can afford it. It will perform close to SLI 7900's and be cheaper.