For (+ -) normal FPS, DO NOT raise your "Lighting" on ULTRA, this is a very strange option (a crowd of people walking, a bunch of shadows / drawing distance, etc.) ... BUT - this is the option that eats up about 20 !!!! FPS (now expensive two bulbs on the horizon -_-). Set it to Low / Medium and you (by magic) will have an acceleration of 15-20 Frames ... Do not draw (range) to Ultra-Medium (because at ultra everything looks horrible in the distance) ... Shadows (if not important to you) can be turned off +-5 FPS. I noticed that the number of the crowd (oddly enough) does not change the FPS ...
Check the settings by standing at the end of the pier in the first city (literally at the beginning), looking at the city, NOT at the sea -_-