KTC Monitor Resolution and Refresh Rate Troubleshooting Guide

Use this page if your KTC monitor displays an image but is stuck at 60Hz, cannot use the expected resolution, or cannot enable the refresh rate advertised for your model.

Quick Answer

Refresh-rate and resolution problems usually come from the signal path, not from one setting alone. Start with the correct cable and port, connect the monitor directly, confirm the monitor is selected in the source-device display settings, and test a safe baseline before trying the highest mode again.

What Direct Connection Test Should I Start With?

Before changing system settings, simplify the setup:

  1. Connect the monitor directly to the computer or console.
  2. Remove docks, KVMs, adapters, hubs, and extension cables.
  3. Confirm the cable standard matches the target mode.
  4. Select the correct monitor input in the OSD.
  5. Restart the source device with the monitor already connected if needed.

A setup that can carry 1080p at 60Hz may still fail at 2K, 4K, 144Hz, 165Hz, 240Hz, HDR, or VRR.

Why Is the Monitor Stuck at 60Hz?

Try these steps in order:

  1. Open the operating-system display settings and make sure the KTC monitor itself is selected.
  2. Set the monitor to its native resolution first.
  3. In Windows, open Display settings -> Advanced display and choose the target refresh rate.
  4. If the expected rate is missing, open Display adapter properties -> List all modes and select the resolution and refresh-rate combination there.
  5. Test another cable of the same or higher standard.
  6. Test another input on the monitor.
  7. Update the GPU driver and reconnect the monitor.

If the higher refresh rate appears only after lowering the resolution, the current path is hitting a bandwidth limit.

Why Can't I Select the Expected Resolution?

  1. Confirm the cable and input support the target resolution.
  2. Test another cable.
  3. Remove all adapters and docks during testing.
  4. In Windows, use Display adapter properties -> List all modes to look for the missing resolution.
  5. In macOS, select the external monitor and review the scaled-resolution options carefully.
  6. If you use a laptop, test both extended mode and single-display mode.
  7. Test another computer if available.

If another computer reaches the correct resolution through the same monitor input, the first device or adapter path is the likely limit.

Why Can't I Use the Highest Resolution and Highest Refresh Rate Together?

This is common on many monitor and GPU combinations. The total bandwidth of the connection path may not be enough for both maximum settings at once.

To find the stable limit:

  1. Start from the monitor's native resolution at 60Hz.
  2. Raise refresh rate step by step.
  3. If the target refresh rate is missing, lower the resolution and test again.
  4. Compare the results on another cable or another input.

If the monitor reaches a higher refresh rate only at a lower resolution, the current path is bandwidth-limited rather than fully broken.

How Do I Enable 144Hz, 165Hz, 240Hz, or Another High Refresh Rate?

High refresh depends on five things working together:

  • the monitor model
  • the monitor input in use
  • the cable standard
  • the source device or GPU
  • the operating-system or console setting

Also check the monitor OSD for Overclocking, OC, or another model-specific high-refresh option. If your monitor requires this option, enable it first, power-cycle the monitor, and then check the refresh-rate list again.

What Should I Check If I Am Using a Mac?

Open macOS display settings and make sure you are adjusting the external KTC monitor, not the built-in display.

If the expected options are missing:

  1. Connect the monitor directly if possible.
  2. Test another USB-C, HDMI, or DP cable.
  3. Remove hubs and docking stations.
  4. Restart the Mac with the monitor connected.
  5. Test another input on the monitor if supported.

How Do I Get 120Hz on PS5 or Xbox?

For PS5:

  1. Use the HDMI cable required by your model and console setup.
  2. Open Screen and Video -> 120Hz Output -> On.
  3. Remember that some games enable 120Hz only during gameplay or in performance mode, not in every menu.

For either console, test a direct connection and reduce resolution if 120Hz still does not appear.

Related basic operations

What Should I Do If the Issue Continues?

Contact support if the expected mode is still missing after direct connection, another cable, another input, driver update, and baseline testing, especially if the advertised product capability still does not match the detected mode.

What Should I Send KTC Support?

Prepare these details before contacting support:

  • order number and purchase channel
  • monitor model and serial number
  • computer, GPU, or console model
  • exact cable and adapter path
  • current resolution and refresh rate
  • target resolution and refresh rate
  • screenshots of advanced display settings if available