Poor performance with large aircraft

I’m having major performance issues when using any large aircraft. It seems to be due to the larger number of systems or something like that.

Using the Cessna 172 I get 75 FPS with DLSS on and about 45 FPS without DLSS. But when using any large aircraft the FPS drops to 7 or 8 FPS.

I’ve tried with A320, A330, 737 Max, 747… I have problems with all of them.

Is anyone else experiencing this problem?

My hardware is a Samsung Book 4 Ultra 9 Notebook
Core Ultra 9 185H
32 GB
RTX 4070