The quick answer
Check the selected display and connection first. A monitor’s advertised maximum may only be available through particular inputs or at particular resolutions.
In this guide
Select the correct display · If the expected option is missing · Keep a small troubleshooting record · Check the game after the desktop
Connecting a high-refresh monitor does not guarantee that Windows immediately selects its highest mode. Before changing game settings or ordering a new cable, confirm what the computer is actually sending to the display. A short, orderly check is more useful than changing several options at once.
Select the correct display
In Windows 11, open Settings, then System, Display and Advanced display. If more than one screen is attached, select the monitor you intend to change. Microsoft documents the current refresh-rate control on this page. Choose a supported rate from the refresh-rate menu and confirm the change if prompted.
Check the resolution as well. Microsoft notes that rates marked with an asterisk may require a resolution change. A number that appears in the list is therefore not always the same combination of sharpness and refresh rate you thought you were selecting.
If the expected option is missing
Open the monitor’s manual and find its supported timing table. Locate the exact input in use: the maximum over HDMI can differ from the maximum over DisplayPort, and some advertised modes require a menu option. Compare that information with the output specification of your computer or graphics card.
Next, simplify the connection. If a dock or adapter is involved, temporarily test a direct connection when your equipment supports one. Change one component at a time and record the result. Swapping the cable, port, resolution and driver together makes it difficult to learn which part was responsible.
Keep a small troubleshooting record
Use a note with five fields: computer output, cable, monitor input, selected resolution and selected refresh rate. Add a sixth field for anything between the computer and screen. This is especially helpful for laptops that have several similar-looking USB-C ports with different capabilities.
For example, if direct connection exposes the desired mode but the dock does not, the dock path becomes the next thing to investigate. That does not automatically mean the dock is defective; it may have a lower supported mode or share bandwidth across multiple displays.
Check the game after the desktop
A game may have its own display mode, resolution, refresh-rate setting or frame cap. Compare those settings with the desktop configuration. An FPS counter reports rendered frames; it is not proof that the monitor is receiving the same number of refreshes per second.
Dynamic Refresh Rate in Windows and variable-refresh gaming are related display concepts but are not interchangeable menu choices. If a setting is unavailable on your hardware, do not force it with unverified registry edits or downloaded configuration files.
- Confirm the desired resolution and refresh rate in Advanced display.
- Check the game’s own settings and any deliberate frame cap.
- Keep the monitor manual available while testing inputs.
- Use official driver and firmware sources for your exact hardware.
Once the connection works, save the successful configuration in your notes. It gives you a useful reference the next time you change a dock, move the PC or reinstall the operating system.
Sources and further reading
Keep exploring
Variable Refresh Rate Explained: A Practical Guide to Smoother Gaming →
The First-Hour Checklist for a New Monitor →
Before you buy in the UK
Before ordering a replacement cable from a UK retailer, identify the ports at both ends and measure the required length in metres. Check the cable’s stated capabilities and the monitor manual together; a different cable cannot add an output mode the laptop does not support.
Cables to compare
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DisplayPort cable
For a direct PC-to-monitor connection. Match the cable’s documented bandwidth and length to the resolution and refresh rate supported by both ports.
View on Amazon UK (paid link)
HDMI cable
An alternative when both devices support your intended mode over HDMI. Check the certification and length of the exact cable; the version number alone does not guarantee a particular refresh rate.
View on Amazon UK (paid link)

