Because i saw your previous post when you upload your settings. I think its so boring that you always try this. We all know that they are pr graphs. First we know that follow scenario is completely random. Second they use 14.2 drivers for thief and 55~ ish fps for 290x max settings is really slow. Probably they used quiet bios. And then look the Y-axis. Do you remind you amd pr graphs? Oh yes. And then the question why now? Dx11 is from 2008. Now they find out the new super API optimizations? They only thing that they can do is bypass some dx11 fuctions for their own. Nothing else.
And if dx11 can rival mantle why microsoft even care to release dx12? A completely new API? And nvidia demonstrate these new drivers with a 3960x and a 780ti.They can do the same with low end cpus? Because we all know low level API helps more low end cpus.