DirectX 12. Not active setup (Rise of the Tomb Raider)

Will explain once I read enough topics on this issue on this and other sites. Basically the problem is that people have either not suitable OS, or outdated hardware or something else. My computer fits all the conditions.

DX12 option in the game settings is not active. Windows 10. Version Of GeForce Experience 416.94.

Config:
-GTX 1080
-FX 8300
-8 gb RAM

You know, not a good build. Before all stood 1050 ti. Decided to replace the video card. The system CPU bottleneck. Not watching enough vidosic on YouTube, bought the mother and the RAM, so all one strap. This limits me in terms of overclocking the CPU, because the performance issue is squarely. Saying that DX12 unloads percent. I want to believe, because CPU usage 100%, at that time, as the video card by 20%.