DisplayPort 144Hz Test
Confirm actual refresh rate and rule out DisplayPort cable or adapter limits before blaming the monitor.
Test now
Start with the matching live browser test, then return here to interpret the result.
Check path
Set 144Hz in the OS display settings.
Run the refresh-rate test in the browser.
Remove docks, adapters, and capture devices.
Buy later
Keep the monitor when settings restore the expected Hz.
Try a certified DisplayPort cable when the mode disappears.
Replace the panel only when the fault follows the monitor.
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FAQs
How do I test if DisplayPort is running 144Hz? +
Set the expected refresh rate in your operating system, open the refresh-rate test, and let the browser measure delivered frames. If it stays near 60Hz, check the cable, port, adapter, GPU settings, and monitor menu.
Can a DisplayPort cable stop 144Hz from working? +
Yes. A weak or uncertified cable can cause missing modes, flicker, black screens, or refresh caps. Use a direct VESA-certified cable before deciding the monitor is defective.
Should I replace a monitor that is stuck at 60Hz? +
Usually no. A 60Hz lock is often a setting, cable, adapter, or GPU output issue. Replace the monitor only after the same limitation appears with a clean cable and another source.
Monitor path
Run the source test.
Use the matching live tester first, then return to the model page only if the fault repeats.