DirectX 12 vs DirectX 11 Performance Slides

Windows 10 will be coming with DirectX 12.  DirectX 12 is the first version of DirectX that really uses multiple cores effectively. Bottom line: In DirectX 11 this frame took almost 9ms to render. 

DirectX 11 vs DirectX 12: Complete Performance Comparison

RedGamingTech

DXGI overview - Win32 apps

Performance mode vs DX11 vs DX12 : r/FortniteCompetitive

Face-Off: Hitman

DirectX 12 vs. DirectX 11 - Ashes of the Singularity Revisited: A

Windows 10 DirectX 12 graphics performance tested: More CPU cores

NVIDIA Talks High Performance Graphics APIs: DirectX12, DirectX11

Exploring DirectX 12: 3DMark API Overhead Feature Test

DirectX 12 Analysis: New Rendering Features, ExecuteIndirect

Monster Rancher 1 & 2 DX for Nintendo Switch - Nintendo Official Site

Developing DirectX® applications - AMD GPUOpen