What is DirectX 12?

Let’s start high-level. DirectX 12 is the newest version of Microsoft’s DirectX application programming interface, which handles visual and other multimedia tasks on Windows-based systems. Most end users know it because a very large number of PC games lean on DirectX in some way for their graphical prowess.

DirectX is mostly associated with Windows, but because Microsoft’s recent “Windows everywhere” push will spread Windows 10’s core bits to virtually every Microsoft platform, DirectX 12 will appear on Windows 10 computers and tablets, Windows 10 Mobile phones, and even the Xbox One in due time. If your device runs Windows 10, it runs DirectX 12, basically.

pcworld.com