A monitor advertised as 144Hz can still be receiving a 60Hz signal. The panel's supported modes, your selected operating-system setting and the browser's ability to draw frames are different things. Check them in that order. This guide helps you confirm the active setting, investigate a missing 144Hz option and use a browser estimate without mistaking it for a hardware measurement.
Start with the display mode, not the animation
Refresh rate describes how frequently a display can update its image. A fixed 144Hz mode has a refresh interval of roughly 6.94 milliseconds. That does not mean every program produces 144 new images each second. A game may render fewer frames, a video may contain only 24 or 30 frames per second, and a browser may miss opportunities to update.
Write down the monitor model, its selected resolution and its connection before changing anything. Some monitors offer their highest refresh rate only through particular inputs or at particular resolutions. A laptop's internal display and an external monitor can also have different supported modes. Check the manufacturer's specifications for the exact model rather than assuming all ports behave identically.
Check 144Hz in Windows
Open Settings, choose System, then Display and Advanced display. If you use several screens, select the monitor you are checking. Read its current display information and choose an available refresh rate from the menu. Select 144Hz if that mode is offered, then accept the change when the image is stable.
Keep the intended resolution selected. Changing resolution can change which refresh rates are available; a higher number at an unexpectedly lower resolution may not be the result you want. If the screen goes blank after changing modes, allow the confirmation timer to revert rather than repeatedly accepting an unreadable setting. Use Microsoft's current display-settings instructions if the labels differ on your system.
Check refresh rate on a Mac
Open System Settings and choose Displays. Select the relevant display, then look for the Refresh Rate option. The available choices depend on the Mac, display, connection and selected mode. Choose the supported fixed rate you want to check. The absence of 144Hz does not by itself prove that the monitor is defective.
Some displays offer an adaptive option, including ProMotion or Adaptive Sync where supported. These modes can vary the refresh rate with content instead of staying at one number. A fluctuating browser estimate may therefore be expected. For a controlled comparison, use a supported fixed mode temporarily, then restore your preferred adaptive setting after testing.
Use the browser estimate as a second check
Open the Refresh Rate test linked below on the selected screen. Keep its window visible, start the estimate and let the readings settle. Close unnecessary tabs and avoid running a heavy game or recording program at the same time. Repeat the observation after moving the browser window between monitors: the screen presenting the page matters.
An estimate near 144 page updates per second supports the conclusion that the browser is updating at that cadence. It does not independently read the panel electronics or certify the active signal. Browser scheduling, power saving, background-tab throttling and workload can all affect the result. Confirm the operating-system setting first and, when available, compare the monitor's own on-screen signal information.
When 144Hz is missing or the estimate stays near 60
Check the complete connection path. A dock, adapter, graphics output or cable can limit the modes exposed to the operating system. Try a direct supported connection and consult the specifications for the resolution and refresh rate together. Do not assume that a connector's shape guarantees a particular bandwidth.
Next, check the selected display, monitor input settings and graphics driver. Restore a supported resolution before looking for the rate again. If Windows or macOS reports 144Hz but one browser stays near 60 updates per second, compare another current browser and test without battery-saving settings. Avoid changing several options at once: record one change and its effect before continuing.
Confirm the result in ordinary use
After selecting the correct mode, compare scrolling, pointer movement and a game that can produce enough frames. Use FPS Comparison to compare sampled motion at equal travel speed, but remember that its FPS labels are targets. A 600 FPS lane cannot turn a 144Hz display into a 600Hz screen.
Keep a short record of the mode, connection and browser result. This makes later troubleshooting easier when a dock, driver update or power setting changes the behavior. A repeatable mismatch across the operating system and monitor information deserves connection troubleshooting; a low result confined to one busy browser points toward page scheduling rather than a broken panel.
FAQ
Can a browser prove that my monitor is running at 144Hz?
No. It can estimate page update cadence. Confirm the selected signal mode in operating-system settings and the monitor's information menu where available.
Why does my 144Hz monitor show only 60Hz?
The selected mode or connection path may be limiting it. Check the correct display, resolution, input, adapter and supported cable specifications before diagnosing the panel.
Does 144Hz mean that every game runs at 144 FPS?
No. Display refresh and game rendering are separate. The game, graphics hardware and settings determine how many new frames are produced.
Why does the estimate change in an adaptive mode?
Adaptive modes may vary with content, and browser scheduling also fluctuates. A supported fixed mode is easier to compare consistently.
Should I leave the highest supported rate selected?
Choose the mode that suits your use, image quality and power needs. Verify that it remains stable at the resolution you actually want.