I have a Titan XP video card. It is the fastest video card available. But I have issues that I am unable to get good FPS. In fastest I can get 30fps part of the time in towns. At 4k the fps is a little lower than it is in 1080p. But not by much. It is not uncommon for my fps to go into the teens even on fastest when in towns. I should be able to run the game at "Fantastic" in 4k with this video card. But when I select this I go to single digit fps. When I check the GPU load. It tends to sit at 20% peaking at 40%. If the video card was the limiting factor here I would think it would be at 100%. I understand there is something with Unity here and how it uses the cores in CPUs. Or lack there of. This issue for me however is a game breaking. The experience of low fps makes me dizzy. Any game that causes me to feel this way is unplayable. I will mention one other thing. My laptop has a GTX770m in it. My laptop gives me better performance at 1080p than my monster gaming machine when it is running at 1080p. I have no clue why. But maybe that gives some sort of clue that there is just some setting or something that needs to be changed.