Mafia minimum requirements for Windows assume having at least Windows XP / Vista / 7 / 8 / 10 operating system. Your processor should be 1.4 GHz or faster or a more powerful one. The minimum RAM requirement is 2 GB. As for a graphics card, it should be 3D Graphics card compatible with DirectX 9.0.
It dips down as low as 120 or so at times. i9 10850K. RTX 3080. 32 GB DDR4 3200 MHz. 2K, 144Hz Monitor. Played both on external HDD and internal M.2 NVMe SSD (made no noticeable difference aside from slightly quicker load times) whiskeylover007. Unlock FPS + Refresh Rate. Turn vsync off in display settings to unlock the fps. Disable fullscreen optimizations on main exe file to unlock refresh rate (Steam>steamapps>common>Mafia Definitive Edition>mafiadefinitiveedition.exe). If ^ doesn’t work then turn off fullscreen and change to windowed, then turn borders off to get fullscreen d9af3.