According to a spotted file as well as an option that has been revealed in the game launcher, Crystal Dynamics could soon add DirectX 12 to Rise of the Tomb Raider game.
There are no detail on which features of the DirectX 12 could be implemented in the game but a spotted DX12.dll file as well as a DX12 option that has been revealed in the game launcher, point out that Nixxes, the studio behind the PC port of the game, could be working on a DirectX 12 update for the game.
While it is still not clear on what will DirectX 12 bring for Rise of the Tomb Raider, it is possible that there will be a significant performance improvement as well as improved multi-GPU support but currently both Nixxes and Nvidia are not talking about it.
Source:
DSOGaming.com.