Cant trust any of these benchmarks, something awry in the game maybe. Another site, another variation of results, and kepler doing much better:
http://www.gamersnexus.net/game-bench/1701-far-cry-4-gpu-benchmark-amd-is-broken-again
This is how you do the benchmark. 1% Time Low fps, Average FPS ->draw.chart!
Someone give these guys FCAT, instead of giving it to those who don't want, don't know how to use it.