Benchmarks: The Witcher 2, The Elder Scrolls V
The GTX 660 Ti averaged an impressive 60fps in The Witcher 2 at 1920x1200, though it was 5% slower than the HD 7870 unless you factor in Gigabyte's overclock, which garnered an extra 5fps.
Nvidia's latest offering managed 69fps when running Skyrim at 1920x1200, 10% faster than the HD 7870 and 7950. Although it was 20% slower than the GTX 670, we were surprised to see the GTX 660 Ti outpace the GTX 580 by 8%.