They say they can only do medium quality textures with high quality rendering, and I'm running the game at high quality textures with high quality rendering. I don't understand why they can't do that. I'm only running a GTX 260 and I can do that, while they are running a GTX 280. I think they don't know how to optimize it, putting the textures at high gives you a clearly better image instead of putting the sliders at max, which just makes the view farther.
DragonfireXZ95's comments