If you're just diving into external monitors, the vast array of options and resolution spread before you can be enough to make you give up and buy an iMac just so that your monitor choice is made ...

You can effectively fix Mode Not Supported, Resolution not supported monitor error on Windows 11/10 PC, by following these solutions.

Learn how to access the Xbox settings that reveal what your display supports — including frame rates (FPS), output resolution, and advanced features like Auto Low Latency Mode (ALLM).

If the Screen resolution setting is greyed out in Display page in Settings of Windows 11/10 here's what you can do to resolve the issue on your computer.