ATI Cards on nvidia nForce Mobo?
I currently have an XFX nVidia nForce 680i TF SLI motherboard and an 8800GTS G92. I am buying a new screen either 24 inch (1920x1200) or 22 inch (1680x1050). I am concerned about how my 8800 will perform on these larger screens. As this is a gaming computer I want my PC to play games on the very highest settings and I don't think my 8800 will be able too. So the question is, will an ATI Radeon work on an nForce motherboard - I'm guessing that it should, just wont be able to do Crossfire. Also which should I go for - Radeon HD 4870 512MB or XFX GeForce GTX 260 896MB? I think the 4870 is slightly faster, but on bigger screens I'd rather have the extra memory.
DESKTOP: Custom Build - HAF 932: Microsoft Windows 7 Home Premium 64-Bit / Samsung 2433 24" LCD 1920x1200/ 6144 MB RAM DDR3 1600MHz Corsair Dominator/ XFX GTX 260 XXX Edition 896MB/ Intel Core i7 950 @ 4.01GHz/ 500GB Sata II 7200 RPM & 320GB 7200RPM/ 700W Jeantech Storm Modular PSU