Microsoft DirectX 12 is DirectX 11 with Mantle Integrated

Sources have revealed that Direct X 12 is basically DirectX 11 with Mantle absorbed, the performance increase on Xbox One is in doubt.

BUILD 2015: The Final DirectX 12 Reveal - PC Perspective

Benchmark: DirectX 12 vs. Mantle & Dx11 on a G3258 CPU, 4790K

Can I have DirectX 11 and DirectX 12 installed at the same time

NVIDIA GeForce GTX 980M - DirectX 12 benchmark and all you need to

DirectX 12 vs DirectX 11 – How DX12 will transform PC gaming on

Mantle API vs DirectX 11 on Battlefield 4 – goldfries

Can I install DirectX 11 instead of DirectX 12 in Windows 10

Hybrid hybrid of GeForce and Radeon with DirectX 12 heterogeneous

Deep dive into OpenGL over DirectX layering

DirectX Versions Top Versions of DirectX with Explanation

Best Alternatives to DirectX - Download DirectX App for Free

Windows 10 Technical Preview Gets DirectX 12

Why DirectX 12 is a game-changer for PC enthusiasts

NVIDIA Talks DX12, DX11 Efficiency Improvements - PC Perspective

DirectX 12 vs. Mantle vs. DirectX 11 CPU & GPU Benchmark