Currently, only XL2540 & XL2740 are listed as G-Sync Compatible monitors. For the latest G-Sync Compatible monitor list, please visit NVIDIA's website for the latest update..
But if your ZOWIE monitor has Adaptive-Sync / FreeSync Premium function, you can still enable the VRR feature with NVIDIA graphic cards.
Learn more about Variable Refresh Rate (FreeSync Premium / G-Sync Compatible / Adaptive-Sync):. https://zowie.benq.com/en-us/knowledge/common/variable-refresh-rate.html