hi.
you have not a nvidia grapics card but perhaps my tip will help.
i have a nvidia gfx-card and fixed my fps problems with changing a parameter in the nvidia systemcontrol for everquest. perhaps there is the possibility there is the same parameter for amd graphics cards.
I am in germany an i dont know the exact english name but i think
the parameter from which i talk is named :
Mode for low latency
or
low latency mode
i set this to ULTRA and my fps issuses were solved
well, i make a also a screenshot.
https://ibb.co/0ywRgqP
good luck