Set up 4K gaming at 120 Hz on Xbox Series X | Xbox Support
If you have an Xbox Series S console, or if your TV doesn’t support HDMI 2.1, you can still enable 120 Hz gaming at a lower resolution. To do this, set your Refresh rate on the TV & display options screen to 120 Hz.
Use Auto HDR for better gaming in Windows - Microsoft Support
Use Auto HDR for better gaming in Windows. In HDR video games, the increased color range and brightness compared to SDR games gives you a more detailed and immersive gaming experience on your Windows PC.