[baxuz]

An important thing, as far as I'm aware of, is that if you have a Gsync monitor, you want vsync enabled, but you don't want your GPU to max-out usage-wise or reach the max refresh rate of your monitor:

https://www.youtube.com/watch?v=YR0vNs0ZdWI

Not sure how it behaves on windowed modes. For instance, Doom Eternal's fullscreen is actually composited on the desktop (could be a Vulkan thing), but doesn't seem to suffer from DWM overhead, latency wise.

[formerly_proven]

DWM can un-redirect applications (skip compositing); VSync is still on, but the effects are the same as-if the application were running with VSync.