Low FPS with RTX 3080

I am using DX 11 but I have some updates again.

I did change my build and now I have since few days a Ryzen 9 5600X with 64 GB RAM and RTX 3080 MSI but sill have issues with FPS which are very strange. The issue are with any kind of configuration (Ultra or Low) and with different airplanes. Temperatures are normal range. Before I was limited by mainthread but now sometimes I got Limited by GPU but it’s very frustating. I think I need to open a ticket.

During the loading the FPS are very low (2 fps)

I did a clean install of Windows 11 and Flight Simulator 2020.