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Screen · September 5, 2026

How to Test if Your Monitor Is Actually Running at 144Hz

Buying a 144Hz monitor doesn't automatically mean you're seeing 144Hz. Here's how to check.

Quick Answer

Open the Refresh Rate Test - it measures your monitor's real, live refresh rate using your browser's frame timing, independent of what your OS display settings claim. If it reports close to 144Hz, your monitor and cable are both delivering it correctly.

Why "144Hz Capable" Doesn't Guarantee 144Hz Right Now

Refresh rate is a chain with several links: the panel has to support it, the port and cable both have to carry enough bandwidth for it at your chosen resolution, your GPU has to be outputting it, and your OS has to be set to use it. A break at any single link in that chain results in a lower effective refresh rate, even though the monitor itself is perfectly capable of 144Hz. This is why two people with the identical monitor model can have completely different real-world refresh rates depending on their cable and settings.

Step-by-Step: Checking Your Real Refresh Rate

  1. First, check your OS display settings and confirm 144Hz (or your monitor's max) is actually selected - many systems default new displays to 60Hz.
  2. Open the Refresh Rate Test and let it run for at least 10-15 seconds for a stable reading.
  3. Compare the measured number to your OS setting and your monitor's advertised spec.
  4. If the number is stuck near 60Hz despite a 144Hz OS setting, check your cable - many HDMI cables and older HDMI ports can't carry 144Hz at higher resolutions, while DisplayPort generally can.
  5. If you're on a laptop, also confirm the panel itself supports 144Hz natively rather than being interpolated.
  6. If you're using a dock, hub, or KVM switch between your GPU and monitor, test with a direct connection too — many docks cap bandwidth well below what's needed for 144Hz, especially at 1440p or higher resolutions.
  7. Check whether any background overlay software (recording tools, some overlay-based launchers) is capping your frame rate; a few of these silently force V-Sync or a frame limit that affects the reading.

Checking In-Game vs. Desktop Refresh Rate Separately

It's worth measuring your refresh rate both on the desktop and, if possible, while a game is actually running, since the two aren't always the same. Some games have their own display settings entirely separate from Windows or macOS, including their own V-Sync toggle, frame rate cap, or even a resolution/refresh rate override buried in graphics settings. If the browser-based test confirms 144Hz on the desktop but a specific game still feels capped, the game's own settings - not your monitor, cable, or OS - are almost certainly the cause.

How to Interpret the Results

  • Reading close to 144Hz (roughly 140-144) - working as intended; small variance is normal browser measurement noise.
  • Reading stuck near 60Hz - either your OS setting, cable, or port is capping it. Check settings first, then try a different cable.
  • Reading fluctuates a lot - could indicate a cable issue, GPU driver problem, or a game/app with V-Sync forcing a lower cap.

Common Causes When It's Not Hitting 144Hz

The most frequent culprit is the cable: a standard HDMI 1.4 cable maxes out well below what's needed for 144Hz at higher resolutions, while HDMI 2.0/2.1 and DisplayPort handle it fine. The second most common cause is simply that the OS refresh rate setting reverted to 60Hz after a driver update or a new cable was plugged in. Also check your GPU's control panel - some default to a "recommended" refresh rate that isn't the maximum.

Cable bandwidth is worth understanding briefly since it trips up so many people. HDMI 1.4 tops out around 340Mbps effective bandwidth, enough for 144Hz only at lower resolutions like 1080p, and not enough at 1440p or 4K. HDMI 2.0 and above, and DisplayPort 1.2 and above, carry enough bandwidth for 144Hz at 1440p and beyond. If your cable came bundled with an older accessory or a different monitor, it's worth checking the exact version printed on the cable or its packaging rather than assuming any HDMI cable is equivalent.

Another less obvious cause: some monitors need the refresh rate manually enabled in their own on-screen display (OSD) menu, often labeled something like "overclock," "OC mode," or a specific Hz toggle, separate from your OS settings entirely. If your OS refresh rate dropdown doesn't even show 144Hz as an option, check the monitor's own menu before assuming a cable or GPU problem.

FAQ

Why does my monitor say 144Hz feels the same as 60Hz sometimes?
This usually happens when V-Sync or a frame cap in a specific game or app limits the output, even though the monitor and OS are both correctly set to 144Hz.

Does the cable really matter for refresh rate?
Yes - cable bandwidth directly limits refresh rate at a given resolution. An older HDMI cable is a very common reason someone can't get past 60-100Hz on a 144Hz panel.

Can I test refresh rate without a game running?
Yes, the Refresh Rate Test measures it directly in the browser with no game needed.

Is a small variance from 144 to 143.8 a problem?
No, that's normal measurement variance and not something to worry about.

Do I need a specific browser to get an accurate reading?
Any modern Chromium or Firefox-based browser reads frame timing accurately enough for this test; you don't need any special software or browser flags.

Will overclocking my monitor past its rated refresh rate show up correctly here?
Yes - the test measures actual delivered frames, so an overclocked panel running above its factory-rated Hz will show that higher number if it's genuinely being delivered.