Deus Ex: Mankind Divided received two updates today. One was just a regular ol' patch for the game. The changes from today's patch can be seen below. In addition, today also marks the date that the game received optional DirectX 12 support. First thing is first, let's get to those general changes.
Changelog for Deus Ex: Mankind Divided (PC build 545.4)

And now, here's a bit of information about the DirectX 12 support. Please note that you have to manually opt-in to use the DirectX 12 API for the game. It has been noted by the developers that not everybody with a DX12 capable card will see benefits from running in this mode compared to the DX11 mode.
Release of DirectX 12 support in Deus Ex: Mankind Divided:WARNING:http://support.amd.com/en-us/kb-arti...ase-Notes.aspx
DX12-supporting driver for NVIDIA graphics cards: http://www.nvidia.com/download/drive...x/107012/en-us

Known DirectX 12 issue:

If you understand the potential risks of seeing similar or even degraded performance, you can check out DirectX 12 for yourself by following the steps above.