So seeing the chart above and Nvidia stating that it's from optimizing drivers for DX11 or whatever, what does amd have to say about this? Do they have an answer to this other than mantle?
"Nvidia revealed in a talk at GTC that the DX11 API update that was showcased on the previous GTC session will arrive in the form of a Geforce Driver, more specifically the Geforce 337.xx Driver. It will be released sometime in April and will result in very significant performance gains inside the DX11 API itself. The new driver takes a well known approach to solve CPU overhead without moving to a new API (DX12 for example). The approach is called ‘Tiled Resources’ and a weak variant of the same is also used in Mantle API. This will also grant Developers more control at the Assembly level.
The numbers revealed by Nvidia were very impressive, especially considering that Low Level access is not possible without a rewrite of the API, this is pretty impressive. Ofcourse, the benchmarks themselves came under criticism because of the fact that a very high end processor was used to test a supposedly “CPU-Overhead-Reducing” Driver. However the performance gain on that very same processor just by shifting to this new driver is quite decent.
Now the numbers that were released showed a decrease in CPU overhead by a factor of about 4.This should result in a performance increase of leaps and bounds in multi-gpu configurations. Of course the fact remains, that if these charts were rigged or manipulated by Nvidia in any way, we will find out soon enough. When the driver is released and third party benchmarks emerge, it will become clear whether Nvidia was true to it word or not."