I run a GTX 470 @ 1920x1080 and usually see 60FPS or better with most games.
I've been playing Alien Vs Predator with DX11 & Tessellation on with 50+ FPS as an average. Also play Bad Company 2 at 60FPS or better, Assassin's Creed 2 plays well, L4D2 plays extremely well.
WoW, CoD, and Bioshock 1 & 2 should be an absolute breeze
with a GTX 470.