Benchmarks: Deus Ex, DiRT 3
The 660 Ti SLI cards averaged 83fps at 5040x1050 in Deus Ex: Human Revolution, only a notch ahead of the GTX 680 but 12% quicker than the HD 7850s, which were in turn 9% slower than the GTX 680 and 7% faster than the HD 7970.
Jumping to 5760x1080, the SLI cards were 6% faster than the GTX 680 and 20% quicker than the HD 7970, while the Crossfire cards were 7% faster than the HD 7970 and 6% slower than the GTX 680.
The GTX 660 Tis were exceptionally fast when testing with Dirt 3 at 5040x1050, besting the HD 7970 and GTX 680 by 29% and 40%. The HD 7850s also performed well, edging ahead of the HD 7970.
After upping the resolution, the SLI setup's lead over the GTX 680 increased to 43% and it bested the HD 7970 by 28%, while the Crossfire cards were 2% slower than the HD 7970 but 10% faster than the GTX 680.