Bullshit claim, proper reviews done show Kepler doing fine. This is just AMD fanboy nonsense that dupes some gullible Kepler owners into believing it because they don't do their own research.
A real claim, I am a Kepler owner and I am pissed I did not buy an R9 290 after seeing benches for Witcher 3, and trust me I have been doing research ever since the first benchmarks have come out. Initially Kelper (both the 780 and titan) were slower than a 960. Now via guru3d ,on the latest drivers with the latest patch, 780 and titan are 3-5 FPS above the 960, what a relief. The R9 290 is beating the 780ti what a joke.
Oh and in before someone tells me to turn down the settings... I bought a Nvidia card not an AMD card!!!!!!!!!!!!!!!!!!!!!!