Yes, you can use the AOC C27G2ZE/BK monitor with an Xbox Series X. Here are some key points to consider:

- Resolution and Frame Rate: The AOC C27G2ZE/BK monitor offers Full HD resolution (1920 x 1080 pixels) and a frame rate of 240 Hz, which is compatible with the Xbox Series X video outputs, although the console can display higher resolutions such as 4K. You can play 1080p games at 120 FPS or less, depending on the capabilities of your monitor and the console.

- Connections: The monitor has DisplayPort and HDMI connections, allowing it to be connected to the Xbox Series X via HDMI, as the console uses HDMI ports for video output.

- Other Features: The curved monitor and LED technology can enhance the gaming experience, but make sure the console and monitor settings are configured to optimise performance and image quality.