The GeForce GTX 650 Ti was far more impressive averaging a playable 32fps.
At 1920x1200 the average frame rate only dips by ~1-2fps so things don’t change much.
Finally, at 2560x1600 the GeForce GTX Titan takes the lead averaging 40fps.

This is 2fps faster than the Radeon HD 7970 GHz Edition and 3fps faster than the GTX 680.