but that caused for many users lots of issues in MSFS ( donāt ask why 
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At leastā¦ I assume he can also disabled VSync and set a usefull FPS max in nvidia control panel in generall settings 5 fps below 165 and in MSFS settings may be to 40.
EDIT: that reddit post is an old mistakeā¦ it was in the first ages of gsync, that vsync must be off. But in a newer spec ( since years ) , vsync in still needed to avoid tearing above the frequencies the monitor can handle.