Hello ! Are you still using Flax. If yes. then tell me: " have you gain any performance or playable fps like 30 all the time or not ?".
Disable most of PostFx visuals via Post Process settings in Game Settings (Graphics Settings | Flax Documentation). Use resolution scaling (eg.
MainRenderTask.Instance.RenderingPercentage = 0.8f). Profile draw calls and objects textures resolution. For Flax 1.7 we did lots of performance improvements to CPU efficiency and will continue doing so for future versions.
good to know