It ususally goes back and forth between CPU and GPU limit. But the first screenshot was after playing around with some settings and forgetting to put it back (including DX11).
As for the GPU memory limit: I can choose the lowest settings, the memory always maxes out and goes sometimes over 100%…
I can also tune and fiddle with a lot of the settings, the CPU Limit seems so bee quite consistent or at least being tie with the GPU limit.
Lowering the render resolution to 90 helps for the frame rate and consistency but I lose the crisp displays which are quite important, especially the ND. An Nvidia driver supporting to crop out certain areas from DLSS (e.g. the displays in the flight deck) would really help a lot here…