165Hz test
Find out whether your screen is actually showing 165 frames per second. Frame time at 165 Hz is 6.06 ms.
Estimated refresh rate
… Hz
- Target frame time
- 6.06 ms
- Measured frame time
- ms
- Long frames (last 240)
Top lane updates at 60 fps, bottom at 165 fps (capped at whatever your display actually shows). If both look the same, you are not getting 165 Hz. For a detailed graph see the full refresh rate test.
Who has 165 Hz displays
Many current 1440p gaming monitors, often overclocked from a 144 Hz panel in the on-screen menu.
Getting 165 Hz working
- Pick 165 Hz in the OS. Windows 11: Settings → System → Display → Advanced display → Choose a refresh rate. macOS: System Settings → Displays → Refresh Rate.
- Cable and port: DisplayPort 1.2+ usually carries 1440p at 165 Hz; HDMI 2.0 often doesn't, so use DisplayPort.
- In games, set the in-game refresh rate (if offered) to 165 Hz and make sure the frame rate cap isn't lower.
Some monitors need an "overclock" option enabled in their menu before 165 Hz appears in the OS list.
Other refresh rates: 60Hz test · 75Hz test · 120Hz test · 144Hz test · 240Hz test · 360Hz test
Questions people ask
How do I know if my monitor is running at 165 Hz?
Open this page and wait a few seconds. If the estimate settles near 165 Hz, the browser is receiving 165 frames per second from your display. You can also check Windows Settings → System → Display → Advanced display, or macOS System Settings → Displays → Refresh Rate.
Why does my 165 Hz monitor show a lower number?
Some monitors need an "overclock" option enabled in their menu before 165 Hz appears in the OS list. Also check that the cable goes into the graphics card rather than the motherboard, battery saver is off on laptops, and hardware acceleration is on in the browser.
What cable do I need for 165 Hz?
DisplayPort 1.2+ usually carries 1440p at 165 Hz; HDMI 2.0 often doesn't, so use DisplayPort. Exact limits depend on resolution, colour depth and whether the monitor uses Display Stream Compression (DSC), so check your monitor's manual.
Is a browser refresh rate test accurate?
It estimates refresh from requestAnimationFrame timing, which browsers align to the display. It reliably separates 60, 120, 144 and 240 Hz, but it is not a lab measurement, and variable refresh (G-Sync, FreeSync, ProMotion) can move it.