It kills GTA IV at the loading screen and won't even get past the Physx intro in Mafia 2, also lowers my fps in other games/ doesn't fix flickering grass in World in Conflict... - back to 258 or 259...
I installed it.
First thing I ran was the AVP dx11 benchmark.
It runs by clicking the exe with pre defined settings and saves a document of results. So I have baseline results to compare. My results went from 46 with the 258 whql driver to 49.1 with 260.52 beta to 52 with 260.63