Please check out this thread/linked post in this thread as my card is the same as yours. I’m still running with these settings today and I see no issues with SU14.
Note:
FPS is lost because of CPU mainthread limited situation. You need to get your system balanced and back to being more GPU limited. DLSS just relieves GPU load a bit which is mainly intended for lower spec’d GPU systems, so will do nothing to relieve CPU load so that is why changing DLSS setting doesn’t impact FPS. I do run with it on, to keep my GPU fans from screaming, but it’s only useful after shedding some CPU loaders to balance your system first.
Main CPU loaders -
-TLOD & OLOD (less so)
-Shadows (quality)
-AI traffic (of all kinds incl roads, workers, ships, and any AI aircraft eg FSLTL/AIG etc)
-Clouds
-Animations (eg GSX animations, or terminal vehicle/people animations)
Main GPU Loaders -
-Render Scale (if you are not running 4K then you may need to increase this to keep GPU busy enough and balance loading)
-Resolution (3090 should optimally be running native 4K)
-Most other graphical options / sliders