I have exactly the same rig as you, except a 3080. I think you should be able to crank up the sim settings pretty much to the max even with DX12, the main thing that will make a difference will be the Terrain LOD. I have it 150 when flying with Fenix, 200 is also possible but I prefer 150. More important is your traffic and add-ons. Don’t load unnecessary add-ons for an airliner, they will add up quickly to 10-15fps. For traffic I’m using the free FSLTL traffic and you can play around with the settings, I have 50 IFR planes, maxxed and no limits for static ground aircraft without any big issues at LSZH where I normally fly from. For bigger airports I would recommend setting limits for ground aircraft. Not using real-time sim traffic anymore.
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