Run the check
Write down the exact monitor, GPU, cable, resolution, and port versions.
Check both manufacturers' supported timing tables for that combination.
Select an OS mode they both support and verify the monitor status menu.
Read the result
A missing high-refresh option may be a mode or adapter limit, not a browser limit.
Limits and next step
The page cannot identify physical link version or certify cable bandwidth.
Repeat the check after changing one setting or connection. Keep a record of what changed before deciding whether the device needs service.