Aliens vs. Predator (2010)
The GeForce GTX 660 is comparable to the Radeon HD 7870 GHz Edition in Aliens vs. Predator (2010) but the latter has higher overclocking potential and goes ahead when both cards are overclocked. It's 4 to 16% slower compared to the GeForce GTX 660 Ti.
Lost Planet 2
The GeForce series is superior in Lost Planet 2, the more expensive GeForce GTX 660 Ti beating the GTX 660 by 18 to 20%. When overclocked to 1083/6668 MHz, the latter can get as close as 8-13%.
Sid Meier’s Civilization V
Unlike the previous game, Sid Meier’s Civilization V runs faster on the Radeon HD 7870 GHz Edition which even beats the GeForce GTX 660 Ti. Its advantage is especially large when antialiasing is enabled.
Total War: Shogun 2
We see a completely different picture in this game:
The GeForce GTX 660 Ti is no faster than its Radeon opponent without antialiasing but as soon as we enable that feature, it goes ahead.
The Radeon HD 7870 GHz Edition and the GeForce GTX 660 deliver the same performance in Crysis 2. They aren’t much different from the GeForce GTX 660 Ti, either.
Hard Reset Demo
Here’s one more game where it’s impossible to differentiate between the graphics cards priced at $229-249 as they all have the same performance.