While I love the Fenix, since moving to a 2 monitor setup (with beta experimental feature) I never get above 15-18fps regardless of the airport (stock vs complex payware). In the 737-600 and Bae 146 I get around 30fps and in GA aircraft in the 50s.
This is with a 5800x3d/6900xt.
I’ve experimented with all kinds of settings to try to improve FPS in the Fenix but it never moves. That does have an affect on FPS in other aircraft though. Obviously it could be because I’m using a 2 monitor setup now but nothing I change seems to affect FPS in the Fenix and other planes don’t have the same issue.
I’ve learned to live it with it for now as 15fps is barely acceptable. I just don’t understand why tweaking the settings (Rendering, LOD, anything) has no affect in the Fenix.