Blur Busters Forums

Unstable monitor frequency with G-sync with G-sync compatible ASUS vg248qg monitor: https://youtu.be/1IUwJAquMYQ
Refresh rate is not in sync with fps in a game and jumps randomly. i7 8700, rtx 2070, windows 10

It doesn't necessarily mean the refresh rate is unstable; it's more likely the meter is inaccurate, especially since it was probably originally created for use with FreeSync, not G-SYNC, which runs off a different driver from a different company.

Just one possibility though. Depends on what you actually see/feel in-game in relation to the meter.