DirectX 12 - what it means for PC gamers?

Game developers can choose: much better performance of a game or/and better image quality with more detailed game world in DirectX 12 comparing to DirectX 11 version of the same application.

CodeWeavers Blogs, Meredith Johnson, Unleashing the Gaming Revolution: CrossOver Mac's DirectX 12 Support Update!

DirectX 12 Ultimate Is Microsoft's Attempt at Unified Next-Gen Graphics on PC and Console

DirectX 12 and a new OpenGL to challenge AMD Mantle coming at GDC? - PC Perspective

DirectX 12 vs. DirectX 11: which is better for PC gaming?

Introducing DIRECTX 12 ULTIMATE

DirectX 12 coming to Windows Phone also - MSPoweruser

The Radeon RX 580 2048SP is a graphics card by AMD. Built on the 14 nm process, and based on the Polaris 20 graphics processor, in its Polaris 20 XL

maxsun AMD Radeon RX 580 8GB 2048SP GDDR5 Computer Video Graphics Card GPU for PC Gaming 256-Bit DirectX 12 DVI, HDMI, DisplayPort Multi Monitors

AMD DirectX® 12 (DX12) Technology

DirectX 12 rumoured to allow combining AMD and Nvidia cards on same PC - Neowin