This is one for all of us AMD users, especially for win10 laptop users, why only Nvidia ppl can play it when even we can! :D
There is Radeon Crimson driver software for us (if you don't have it installed yet, you should be) and it works a little different than Nvidia's "run with graphics processor" option.
When installed right click anywhere on desktop and select "AMD Radeon Settings".
Go to "Preferences" and Radeon Additional Settings will pop up.
Now click "Power", then "PowerPlay" and set everything to Maximize Performance and click "Apply".
Then do the same thing in "Switchable Graphics Global Settings" to set it to max performance and apply.
And last thing to do is to check if the game has been set to high performance in "Switchable Graphics Application Settings" (you'll see icons of games and programs of recently used applications and their graphics settings there).
Greetings to all fellow gamers and I hope this was useful ;)