Major new features of DirectX® 12
ASYNC SHADERS :

MULTI-THREADED COMMAND BUFFER RECORDING :

As the PC graphics industry continues down the path of low-overhead graphics APIs, today I wanted to bring you some new details on two significant features of DirectX® 12. These features are called “multi-threaded command buffer recording” and “async shaders,” and they are poised to make a significant difference for gamers everywhere. Let’s take a look at what they do and why they matter.
http://community.amd.com/community/amd-blogs/amd-gaming/blog/2015/04/22/major-new-features-of-directx-12