That'll probably hit around 30 with dips to 20.

You'll be hitting around 60 but mostly you'll be at least 8FPS under 60.

I have 2080 super and I run it on second to the highest preset (1080p). I can tell you now that:

Flew around Manila, Philippines and my frames were 25-30FPS; the same goes for Tokyo, Japan.
Flying over sea or land above 30,000 ft and youll be getting 60FPS easily

I've yet to try and fly on a busier city like New York but I predict it'll be around 20 FPS give or take. Hope this helps

The sim isn't heavily CPU reliant and it's slightly under ideal, so you're good for high 60FPS 1080p. You might actually be able to boost that up to ultra.

I voted no because an RX 580 can’t hit over 30 FPS on medium on the ground. It increases in the air though. So an RX 570 being weaker would be suited for low settings. You can do medium, but it’ll be around 20FPS on the ground and 30 in the air. But I recommend low settings.

RX 580 delivers about 48 Fps on medium settings. I think you get close or better than 30 Fps on a RX 570. People here have no idea how good it's optimized.

An RTX 2070S averages the sim at about 55FPS Ultra 1440p. So it’ll be close to 60FPS average, but not there.