Did Microsoft Put Secret Sauce in Xbox One? DX12 May Allow Xbox One To Save GPU Time, Render Ray Tracing, SuperFog And Custom Effects

[Conina]

"Microsoft, though, claims that the Direct3D 11.* for Xbox One features significant enhancements in the area of runtime overhead, which results in a very streamlined, “close to metal” level of runtime performance. Therefore, there is no need for a special close-to-metal API on Xbox One."

“What Mantle creates for the PC is a development environment that’s similar to the consoles, which already offer low-level APIs, close-to-metal programming, easier development and more (vs. the complicated PC environment).

http://www.xbitlabs.com/news/multimedia/display/20131014235009_Microsoft_Xbox_One_Will_Rely_on_Direct3D_11_API.html