When the game came out, it was like in a dream; what I have dreamed of as an evolution for Flight Simulator was beyond my expectations. Then performance problems arose; which disappointed me quite a bit and I was a little angry with Asobo. Last night I had been looking for adjustments to the settings in hopes of fixing the problem. Nothing to do, the stuttering problem persisted. In a last ditch effort, I reset my Nvidia video card and Windows settings to the default settings. Bingo!!, all the problems were gone! I flew at low altitudes in Paris and London without any performance issues. The moral of the story is that I have relied on people telling how to adjust my settings in YouTube clips and in certain articles and it turned out that those recommendations were not worth a penny. I think the only specialists in that matter are basically Asobo and Nvidia. I want to respectfully greet the Asobo team who had nothing to do with the problems encountered.
In all fairness, some of the tricks has become counter-productive along the way.
They were useful when they were posted, but updates to the sim or drivers sometimes make them useless or counter-productive.
After each update, sim or nVidia driver, I always reset them to defaults as the first thing if I sense a performance decrease. At least once it saved me from joining the “sim update hurt my performance” choir.
this is what a lot of users , incl me, told often within the forum ( and what often was helpful ).
Just don’t play with settings you not know what you do. Let the nvidia control settings and/or others at the defaults and try to use in-game settings only to made msfs playable/optimze with/for your hardware.
Only in case you have trouble with the in-game settings and/or you want realy waste your time you should start a deep dive into the e.g. manual settings with help of nvidia control… and may be with the million possible settings, you can get possible 5fps more… or you run into trouble which you never thought 
And also a application developer expect a normal default settings. No company in the world can test all possible tweaks for all hardware combinations.
On my first trip as a private pilot student, my instructor said “don’t touch the buttons if you don’t know what they do…especially the red ones”. The same applies to windows/nVidea settings.