you can open nvidia control panel and choose 3d settings (1 in picture)
In (2) you can set global “limits” which used for all your apps , and in (3) you can set programm specific settings.
So it looks in my case in global (2) , because I use in-game vsync:
I have a MAX fps limit to my monitors fps and a Max Background FPS limit to 25 ( in case the msfs application is in background ).
For a first test you can of course limit in global (2) the max fps and try out MSFS. If that works , you can set in global a usefull fps max and in programm settings (3) the 30fps.
In programm settings you can choose Microsoft Flitght Simulator…
