Got it, check this vicky:-
Farewell to DirectX? | bit-tech.net
This is what Richard Huddy, Manager of ATI’s GPU division has claimed:-
And some interesting discussion on this, here:-
The DirectX Performance Overhead - techPowerUp! Forums
PS: Let me make a correction, it's not AMD is telling the world about the negative side of DX11, actually the world is telling AMD about it.
Farewell to DirectX? | bit-tech.net
This is what Richard Huddy, Manager of ATI’s GPU division has claimed:-
'It's funny. We often have at least ten times as much horsepower as an Xbox 360 or a PS3 in a high-end graphics card, yet it's very clear that the games don't look ten times as good. To a significant extent, that's because, one way or another, for good reasons and bad - mostly good, DirectX is getting in the way.' Huddy says that one of the most common requests he gets from game developers is: 'Make the API go away.'
'I certainly hear this in my conversations with games developers,' he says, 'and I guess it was actually the primary appeal of Larrabee to developers – not the hardware, which was hot and slow and unimpressive, but the software – being able to have total control over the machine, which is what the very best games developers want. By giving you access to the hardware at the very low level, you give games developers a chance to innovate, and that's going to put pressure on Microsoft – no doubt at all.'
And some interesting discussion on this, here:-
The DirectX Performance Overhead - techPowerUp! Forums
PS: Let me make a correction, it's not AMD is telling the world about the negative side of DX11, actually the world is telling AMD about it.