Stumbled across this review, reading Titan reviews the other day.
AMD Radeon HD 7950 Boost vs. Nvidia GeForce GTX 660 Ti: frametimes
These games were tested.
Assassin's Creeed III
Max Payne 3
Battlefield 3
Far Cry 3
Hitman: Absolution
Very interesting. Here's what I would conclude from this article:
Assassin's Creed: tie for speed, tie for smoothness
BF3: tie for speed, HD7950 smoother
Far Cry 3: GTX660Ti faster, GTX660Ti smoother
Hitman: HD7950 faster, GTX660Ti smoother
Max Payne 3: HD7950 faster, HD7950 smoother
Overall:
Speed: HD7950 two wins, GTX660Ti one win, two ties
Smoothness: HD7950 two wins, GTX660Ti two wins, one tie
The author of the article picks the 660Ti as the winner, just as TechReport did, however, and I assume that's because when the HD7950 gets in trouble with smoothness, it does so to a greater degree and in the more demanding games. Far Cry 3 is the biggest culprit, apparently.