you get tearing if you have higher fps than your monitor can handle… and avoid that is the only thing for what Vsync exist. Are your fps above what your monitor can handle ?
Andd the question is then still open: does enable/disable nvidia Frame-Generation change the situation ?The question is important, because the game not know about that “magic” Frame-Generation and may be in that case, the in-game setting have an issue ( repeated: a guess, a may be, a… 
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@WarnersWorld yes… Gsync is then for syncing below the monitors max fps