DisplayPort 144Hz Test
Confirm actual refresh rate and run high-frequency DisplayPort cable testing before blaming the monitor.
20 seconds. No upload.
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.
Run before buying
Open the browser test with this exact symptom selected. Use repair picks only if the issue repeats.
Run exact symptom
Open the test with this page preselected.
Confirm one fix
Change surface, cable, receiver, or settings once.
Use picks last
Only shop when the same issue repeats.
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.