Left 4 Dead
We tested Valve's zombie shooter using a custom-recorded timedemo from the game's first campaign. We maxed out all of the game's quality options and used 4X multisampled antialiasing in combination with 16X anisotropic texture filtering.

Yeah, so pretty much any of these cards will run Left 4 Dead fluidly at the highest resolution we can manage. That kind of makes fine-grained analysis seem superfluous, but we can still see clear performance differences at 2560x1600, for what it's worth.