DisplayPort 144Hz Test
Confirm actual refresh rate and run high-frequency DisplayPort cable testing before blaming the monitor.
Check path
Set 144Hz in the OS display settings.
Run the refresh-rate test as the high-frequency DisplayPort cable testing baseline.
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.
Repair picks
Before replacing a monitor, use a certified cable to rule out refresh-rate caps, flicker, and signal instability.
When warranty will not cover a confirmed panel defect, compare current QHD high-refresh IPS options.
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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.
Run the source test.
Use the matching live tester first, then return to the model page only if the fault repeats.