Benchmarks: Battlefield 3, Crysis 3
Here we see that the Radeon R9 270X is just 1% faster than the Radeon HD 7870 while it was 14% faster than the GTX 660 and just 1% slower than the GTX 660 Ti. The Radeon R7 260X was just 5% faster than the Radeon HD 7790, 5% slower than the GTX 650 Ti and 15% slower than the Radeon HD 7850.
Although we see a 21% increase in performance for the Radeon R9 270X when compared to the Radeon HD 7870 in Crysis 3 at 1920x1200, keep in mind this is just 5 fps more. The R9 270X was also 16% faster than the GeForce GTX 660.
The Radeon R7 260X was 14% faster than the Radeon HD 7790 at 1920x1200 and 11% faster than the GTX 650 Ti.