To run Mafia 4 on high graphics settings your PC will require at least a 4GB GeForce GTX 1070 / Radeon RX Vega 56 8GB with a Core i7-6700K 4-Core 4.0GHz or Ryzen R5 1600 CPU. The RAM requirements are at least a 16 GB memory. To meet min requirements your hardware requires at least a Radeon R9 380 or GeForce GTX 960 2GB, which you will likely need to run on low graphics setting in game. You may need to adjust your screen resolution down from 1080p to reach a stable 30FPS. Also try adjusting other in-game graphic settings to further improve your minimum performance. To be able to run at all you will need at least 8 GB system memory. Finally, Mafia 4 will need hardware that is a 3 year old PC or younger to run recommended.