LOW FPS WITH RADEON GPU

I am experiencing low FPS with a RX 5700 XT GPU and a ryzen 3700x CPU.

When I am play with graphic settings in ultra, sometimes I am getting FPS even under 50 and some times 80 but nor for too long, the most of the time the game gives 60 -65 fps, if I change the setting to high the performance increase just around 5 FPS, on medium setting the performance goes around 80 - 85 FPS. I have seen videos on youtube where people are playing this game over 100 FPS with ultra settings.

I've been playing Ghost Recon Breakpoint at max settings and the FPS goes over 90 -100 all the time.

I'm hopeful anyone could help me with this issue.

Thanks