Acer XB323U User Manual page 19

Note: The DisplayPort of this monitor is purposely supporting the
G-Sync compatible/Adaptive-Sync support technology. This technology
allows Adaptive-Sync (DP) supported graphics source to dynamically
adjust display refresh rate based on typical content frame rates in
order to eliminate stuttering and enhance low-latency display.
Note: Overclocking may result in flicker or other adverse effects that
may derive from the total configuration of the system connected to
the display, and possibly, in addition, the display's panel
specifications. It may be possible to resolve or reduce such effects by
setting a lower refresh rate.
EN-9