Using X-plane 11 for more than a year now, I update frequently the drivers of an RX580 of 8Gb but I never get a good rate of FPS, attached settings
It is commented by the forums that AMD OpenGL drivers are not good and therefore the result is poor despite having a graphic face
I do not know what the problem is between application and graphics, but I do know that other users with similar graphics from another manufacturer get much better results.
I pass a link to a video that I made with the GeeXlab tool in which the graph is at 0% of work and at other times 100%, is something that I do not understand very well, gives the feeling that stops for some reason.
I admit that I do not have a very powerful processor, i7 2600 3.4 Ghz, but this is never saturated