Kalmenus

I have the specs below AMD a10-7870 at 4.5ghz 16gb of ram RX580 GPU When I launch the game it pegs my cpu at 99% then once in game I can get about 12 to 13 FPS to almost 30 at times. After the last few patches it seems now I cant even play the game without it maxing cpu. Yes I have killed all non essential processes ect. Just wondering I take it the game was not optimized to work on a AMD CPU. I have no issues with any other games, even the ones that are cpu heavy.