uninstall or disable Adrenaline, this built in overlay seems to cause performance issues (we are looking to the cause of this and a long term resolution)
Dx11 or Dx12?
Newer GPU's are commonly Dx12 enabled and will perform better using Dx12. Older GPU's and many AMD GPUs have the best performance using Dx11. Be sure to restart the game after making these changes.
manic dock