So my game runs fine everywhere else, even during big fire fights with 20+ NPC's, but the city makes me drop to 20 FPS... does anyone know why this is happening? I have everything on Ultra except for shadows which are on high. My rig is an i7 3770k octo core with 16 gb of ram, and an R9 390 Nitro 8 GB. I should be able to run this perfectly fine.