How to: Resolve Flickering Issues with G-SYNC on Your XENEON OLED Monitor
If you're experiencing flickering or performance issues while using G-SYNC on an HDMI connection, we recommend trying the DisplayPort cable that came with your monitor. Our G-Sync compatible monitors are specifically designed to work flawlessly with a DisplayPort cable.
By switching to DisplayPort, you may find that the issue is resolved and you can enjoy smooth and uninterrupted visuals.
Please refer to the following visual from Nvidia's website to confirm compatibility: