Quote Originally Posted by Andrew LB View Post
Mantle is nothing more than a copy of Microsoft's low level directx based API found on the Xbone.
You are wrong.

It is not even compatible with Xbox one. Source

Quote Originally Posted by Andrew LB View Post
You inferred Mantle is some sort of DirectX replacement. It's not.
You are wrong again. See the link I posted above:

This is what Mantle does. It bypasses DirectX (and possibly the hardware abstraction layer) and developers can program very close to the metal with very little overhead from software. This lowers memory and CPU usage, it decreases latency, and because there are fewer “moving parts” AMD claims that they can do 9x the draw calls with Mantle as compared to DirectX.