My 240Hz monitor only showing 144Hz: Fix DP version limits

If you’re searching for my 240hz monitor only showing 144hz, the first thing to check is your display connection. Some gaming monitors support 240 Hz through DisplayPort but are limited to 144 Hz through HDMI, while others need a specific monitor setting or compatible signal configuration to reach their maximum refresh rate. Start by checking the manufacturer’s specifications, then troubleshoot Windows, your cable, graphics drivers, and monitor settings. You usually do not need to replace your hardware, and forcing an unsupported refresh rate should not be your first solution.

Why my 240Hz monitor only shows 144Hz

When Windows offers 144 Hz instead of your monitor’s advertised 240 Hz, the operating system is usually exposing the modes available through the current display configuration. The monitor itself may be working correctly even though the desired refresh rate is missing.

The most useful first step is to establish whether your monitor supports 240 Hz through the connection you’re currently using. The advertised maximum refresh rate alone does not confirm that every input supports the same resolution and refresh-rate combination.

Common causes include:

• The HDMI port supports up to 144 Hz on your particular monitor.

• The monitor is connected through an adapter, dock, or cable that limits the signal.

• Windows is using a lower refresh rate or the wrong display.

• The selected resolution or color configuration restricts the available modes.

• A monitor-specific overclock or high-refresh setting is disabled.

• The graphics driver is preventing Windows from exposing the expected refresh rate.

• The computer’s video output cannot deliver 240 Hz at the selected resolution.

A concrete example illustrates why the connection matters. Dell documents that its Alienware AW2723DF supports 48–144 Hz through HDMI 2.0, 48–240 Hz through DisplayPort 1.4 by default, and up to 280 Hz through DisplayPort with its overclock feature enabled. For that specific monitor, seeing only 144 Hz over HDMI is expected behavior, not evidence of a defective display.

Your monitor may have different limits, so use its own manual rather than copying another model’s settings.

Fix my 240Hz monitor only showing 144Hz in Windows

Before changing hardware, verify that Windows is configured to use the appropriate refresh rate. The setting can be overlooked when setting up a new monitor, reinstalling graphics drivers, or connecting a secondary display.

Select 240 Hz in Windows 11

Follow these steps:

1. Right-click an empty area of the desktop and select Display settings.

2. Open Advanced display.

3. If more than one monitor is connected, choose the 240 Hz display.

4. Find the Choose a refresh rate dropdown.

5. Select 240 Hz if it is listed.

6. Confirm the change and verify that the display remains stable.

After applying the setting, return to Advanced display and check the reported refresh rate and resolution.

Microsoft explains that the available refresh rates depend on the capabilities of the selected display. Windows may also identify certain modes as incompatible with the current resolution, and selecting them can change the resolution automatically.

If the 240 Hz option is missing entirely, changing other Windows preferences is unlikely to help. Continue with the connection checks below.

Check Windows 10 display settings

In Windows 10, you can also use the display adapter properties.

1. Right-click the desktop and open Display settings.

2. Select Advanced display settings.

3. Select the correct monitor.

4. Open Display adapter properties for the display.

5. Select the Monitor tab.

6. Inspect the Screen refresh rate dropdown.

Choose 240 Hertz if the option is available as a supported mode. Apply the setting and confirm that the picture remains stable.

If 144 Hz is still the maximum, do not assume that Windows is malfunctioning. The current connection might be limiting the available modes, or the display may require a particular input or monitor setting.

Make sure the correct display is selected

Windows stores display settings separately for each connected screen. If you use a laptop alongside a gaming monitor, you may accidentally be viewing the refresh-rate options for the laptop panel instead.

Use the Identify function in Windows Display settings to determine which number corresponds to each physical monitor. Select the gaming monitor under Advanced display and check its current resolution and refresh rate.

This check is especially useful in dual-monitor setups or after rearranging displays. Your primary display does not necessarily have the highest refresh rate, and settings for one monitor do not automatically apply to another.

Check the HDMI and DisplayPort connection

The connection between the computer and monitor is one of the most important factors when a 240 Hz display stops at 144 Hz. The monitor, GPU output, cable, and any intermediary device must all support the intended signal.

Check the monitor’s input specifications

Find the exact monitor model on its rear label or in its OSD information page. Open the manufacturer’s manual or official specifications and look for a table of supported resolutions and refresh rates.

Check the maximum rate for each input at the desired resolution. Do not assume that HDMI and DisplayPort offer identical capabilities on the same monitor.

For instance, the Alienware AW2723DF example above supports only up to 144 Hz through HDMI 2.0, whereas DisplayPort 1.4 supports 240 Hz by default. Switching to a suitable DisplayPort connection is the correct solution for that particular configuration.

Other monitors may support 240 Hz over HDMI, so switching connectors is not automatically necessary. Follow the limits documented for your model.

Check these details before buying a new cable:

• The maximum refresh rate supported by the monitor’s current input.

• The resolution supported at that rate.

• The capabilities of the GPU output.

• Any requirements for DSC, color depth, or a monitor-specific setting.

• Restrictions introduced by adapters or docking stations.

The specification table is more useful than the connector’s appearance or a generic claim about which interface is best for gaming.

Try a suitable DisplayPort or HDMI cable

A cable that is damaged or unsuitable for the required signal can prevent the monitor from using its maximum refresh rate. It may also cause flickering, brief black screens, or intermittent signal loss.

First, reconnect the cable securely at both ends. If possible, test with the cable supplied with the monitor or another known-good cable rated for the required resolution and refresh rate.

If your monitor requires DisplayPort for 240 Hz, use a suitable DisplayPort cable and connect it directly to a compatible GPU output. If the manual confirms that HDMI supports the full rate, use an appropriate HDMI connection instead.

Avoid assuming that every cable with the right connector supports every refresh-rate combination. The cable must be appropriate for the bandwidth and signal configuration specified by the device manufacturers.

Remove adapters and docking stations

If your monitor connects through a USB-C hub, docking station, HDMI adapter, KVM switch, or splitter, temporarily remove that intermediary from the signal path.

Connect the monitor directly to a supported video output on your PC and check Windows again.

Adapters and docks can impose display-mode restrictions even when the monitor and graphics card individually support higher refresh rates. Their capabilities may also change when multiple displays are connected.

If 240 Hz appears after bypassing the dock, investigate that device’s specifications before replacing anything else. You may only need a different connection path to restore the monitor’s supported maximum.

Check the resolution and color settings

A 240 Hz refresh rate may be available at one resolution or color configuration but not another. This is particularly relevant when moving from Full HD to QHD or enabling additional display features.

Restore the monitor’s native resolution

Open Windows Display settings and select the monitor’s recommended resolution. For many Full HD displays, this is 1920 × 1080, while many QHD displays use 2560 × 1440. Confirm your actual model’s native resolution rather than relying on these examples.

Return to Advanced display and check whether 240 Hz appears.

If the option becomes available at a lower resolution, the higher-resolution mode may exceed the capabilities of the current connection or signal configuration. Check the manual’s supported timing table to determine whether the desired resolution and refresh rate are compatible.

Do not permanently lower the resolution simply to gain access to 240 Hz without considering image quality. A native-resolution mode is generally preferable when the hardware supports it.

Test with HDR disabled

If HDR is enabled in Windows, temporarily turn it off and inspect the available refresh rates. You can also review the color-depth and output-format settings in your GPU’s control panel.

Resolution, refresh rate, color depth, and HDR all affect the demands placed on the display connection. A connection may support 240 Hz under one signal configuration but not every combination of high refresh rate, high color depth, and HDR.

If disabling HDR restores 240 Hz, you have narrowed the problem to the signal configuration. Check your monitor and graphics hardware specifications to determine whether the features can operate together at the desired resolution.

You do not necessarily need to leave HDR disabled. Use this test to identify the limitation, then select a supported combination that meets your image-quality needs.

Review the monitor’s overclock or high-refresh setting

Some gaming monitors expose an overclock setting through the OSD to enable their highest advertised refresh rate. Other models reach their maximum rate without requiring an overclock setting.

Open the monitor’s OSD using its physical buttons or joystick. Confirm the active input and look for a manufacturer-documented option related to Overclock, Maximum Refresh Rate, or DisplayPort mode.

Dell’s instructions for the Alienware AW2723DF, for example, specify using DisplayPort 1.4 and enabling the OSD overclock feature to reach 280 Hz. That feature is unnecessary for its standard 240 Hz mode, which is supported over DisplayPort by default.

Do not generalize those instructions to another monitor. If your model requires a particular setting for 240 Hz, follow the exact manual and then recheck Windows. If the option does not exist, do not attempt undocumented button combinations to force it.

Update your graphics driver and GPU settings

If the monitor supports 240 Hz through the current connection and the mode remains unavailable, investigate the graphics driver and control panel.

Check NVIDIA Control Panel

On a system with a supported NVIDIA GPU, open NVIDIA Control Panel and navigate to Display > Change resolution.

Select the correct monitor, choose its native resolution, and inspect the available refresh rates. If 240 Hz appears as a supported mode, select it and apply the change.

NVIDIA documents the Change resolution page as the location for selecting a display’s refresh rate. After applying the mode, reopen Windows Advanced display to verify the reported refresh rate.

If 240 Hz is absent from both NVIDIA Control Panel and Windows, the cause may be the connection, the display’s supported modes, or the driver configuration.

NVIDIA provides custom-resolution functionality, but forcing unsupported timings is not the first recommended fix. The company warns that custom settings beyond a display’s advertised specifications may cause damage and potentially affect warranty coverage.

Check AMD Software or Intel graphics settings

On AMD systems, begin with Windows Advanced display settings, then inspect AMD Software: Adrenalin Edition if necessary. AMD provides custom-resolution options on supported configurations, but it also advises users to check the selected display’s specifications and compatibility requirements.

On Intel systems, confirm that the correct graphics output is in use and that the appropriate driver is installed. Intel’s display troubleshooting guidance recommends checking the cable, confirming monitor compatibility, and performing a clean graphics driver installation when expected refresh rates remain unavailable.

Menu names and availability vary by GPU generation and software version. Follow the support documentation for your hardware instead of assuming every control panel offers identical options.

Update or reinstall the graphics driver

If the monitor previously worked at 240 Hz but now offers only 144 Hz, check whether the problem began after a graphics driver update, Windows update, or hardware change.

Obtain the appropriate driver from NVIDIA, AMD, Intel, or your computer manufacturer’s official support page. Install it, restart the computer, and inspect the available refresh rates again.

For laptops with hybrid graphics or manufacturer-specific display routing, the computer maker’s validated driver may be relevant.

If a standard update does not help and the problem began after a driver change, consider a clean installation using the GPU manufacturer’s documented procedure. Intel specifically recommends clean driver installation for persistent refresh-rate problems.

A driver reinstall cannot overcome a physical port’s bandwidth limit, so avoid repeating software changes without checking the complete signal path.

Troubleshoot common 240Hz-to-144Hz problems

Use the following table to choose the next step based on the behavior you observe.

If none of these checks restores the missing mode, record your exact monitor model, GPU or laptop model, connection type, resolution, and available refresh rates. This information helps manufacturer support determine whether the limitation comes from a particular input, driver, or hardware configuration.

Do not repeatedly force the same unsupported mode. A stable 144 Hz signal is preferable to a higher setting that causes black screens, artifacts, or signal dropouts.

Check whether the game is limited to 144 FPS

Sometimes Windows is already using 240 Hz, but the game appears to be limited to 144 FPS. This is a different problem and should not be treated as a missing monitor refresh rate.

Check Windows Advanced display first. If it reports 240 Hz, inspect the game’s video settings for a frame-rate limit, V-Sync option, or display mode setting that caps performance.

Also check whether the GPU control panel has a per-game or global frame-rate limit enabled. NVIDIA Control Panel, for example, includes a Max Frame Rate option for compatible applications.

A game’s FPS depends on the rendering workload and system performance. A 240 Hz monitor does not force the GPU to produce 240 frames every second. Conversely, a game running at 144 FPS does not prove that the monitor is limited to 144 Hz.

This distinction prevents unnecessary cable purchases and refresh-rate changes when the display is already configured correctly.

Frequently asked questions

Why is my 240Hz monitor only showing 144Hz?

The most likely explanation is a limitation in the active input, cable, resolution, or display configuration. Some monitors support 240 Hz through DisplayPort but have a lower maximum through HDMI. Check your exact model’s specifications before changing hardware.

Do I need DisplayPort to run a 240Hz monitor?

Not always. Some monitors support 240 Hz through HDMI, while others require DisplayPort for particular resolutions or features. The correct connection depends on the monitor’s input specifications and the GPU’s output capabilities.

Can a 240Hz monitor work at 144Hz without being defective?

Yes. A monitor may operate at 144 Hz because of the selected input, supported resolution, or current settings. If the manufacturer documents a lower limit for that configuration, the behavior may be expected rather than a hardware fault.

Should I force 240Hz through a custom resolution?

Only consider custom modes after verifying the monitor’s specifications and completing the standard troubleshooting steps. Custom settings may be incompatible with the display, and NVIDIA warns that modes outside the advertised specifications can cause damage or affect warranty coverage.

Will a new graphics card fix the problem?

Only if your current graphics output cannot support the required refresh rate and resolution. If the existing GPU already supports the mode, a cable, port, driver, or monitor setting may be the actual limitation. Verify compatibility before buying new hardware.

Final verdict

If your 240 Hz monitor only shows 144 Hz, check the exact model specifications first. The active connection may be limited to 144 Hz even though another input supports 240 Hz.

Next, verify Windows Advanced display settings, the native resolution, cable, GPU output, and any monitor-specific overclock option. Update the graphics driver only after checking the connection, and test without adapters or additional displays if needed.

The goal is a stable 240 Hz signal through a configuration the manufacturer supports. You should not need to replace the monitor or force an unsupported refresh rate before identifying the actual limitation.