drivers problem rx 560 on ubuntu 16.04

Hi, I installed rx560 2GB oc, but after installation I didn't see a performance difference between my old nvidia 7300GT and in 2D webGL rendering nvidia performs better. I installed the latest drivers and installation was successful. I try inix to see drivers on graphics card it says that the ati, amdgpu is loaded and the vesa, radeon, fbdev are unloaded. I try game life is strange and it says that driver is unsupported. I try another game and this says that openGL is unsupported and that number of vertex units is 0. But I tryed warthunder and it runs but on lowest settings and almost unplayable. Thank you for any answer.