hdr mode looks washed out and grey on my pc, not bright like it should.

Diagnosis

The "washed out" or grey appearance on the BenQ EW3270U typically stems from a mismatch between the Windows HDR metadata and the monitor's internal processing. This happens when the OS is sending a High Dynamic Range signal, but the monitor is interpreting it as Standard Dynamic Range (SDR) or is applying an incorrect gamma curve. Because the EW3270U is an edge-lit panel and not a local-dimming OLED or Mini-LED, it relies heavily on software-side luminance mapping to prevent the image from looking flat. If you see greyish blacks and muted colors, the monitor is likely in "HDR Effect" mode rather than "HDR" mode, or Windows is utilizing a generic color profile that doesn't align with the EW3270U's peak brightness of 400 nits. You can confirm this by checking the On-Screen Display (OSD); if the "HDR" setting is greyed out or says "SDR," the handshake between your GPU and the display has failed, causing Windows to "stretch" the colors, resulting in that characteristic washed-out look.

How to Fix It

Follow these exact steps to synchronize the signal and calibrate the luminance:

1. Hardware Handshake: Ensure you are using a High-Speed HDMI 2.0 cable. The EW3270U requires a 18Gbps bandwidth to push 4K at 60Hz with HDR; older cables will cause the signal to drop to SDR or flicker.
2. Windows Activation: Press Win + Alt + B to quickly toggle HDR. If that doesn't work, go to Settings > System > Display > Use HDR and toggle the switch to On.
3. SDR Content Brightness: While HDR is on, look for the "SDR content brightness" slider in the same Windows menu. Slide this to approximately 40-60%. If this is too low, your non-HDR windows (like Chrome or Folders) will look dim and grey while the HDR content looks bright.
4. Monitor OSD Configuration: Press the Menu button on the monitor. Navigate to Picture > HDR. Select HDR. Do not select "HDR Effect," as this is a software emulation that adds artificial contrast and often makes the image look unnatural or "greyed" in the shadows.
5. Windows HDR Calibration: Download the Windows HDR Calibration App from the Microsoft Store. Run the app and follow the prompts to set the "Minimum Luminance" to 0 and the "Maximum Luminance" to exactly 400 nits to match the EW3270U's hardware specs.

If That Didn't Work

• NVIDIA/AMD Color Depth: Open the NVIDIA Control Panel or AMD Radeon Software. Navigate to Display > Change Resolution. Ensure "Output color depth" is set to 10 bpc (or 8 bpc with dithering) and "Output color format" is set to RGB. If it is set to YCbCr422, the colors will appear muted and washed out on this specific BenQ panel.
• Disable "Game HDR": The EW3270U has a specific "Game HDR" preset in the OSD. While it sounds beneficial, it often overrides the Windows HDR signal with a static contrast curve that kills shadow detail. Switch back to the standard "HDR" or "User" mode for a more accurate image.
• Update Firmware/Drivers: Ensure your GPU drivers are updated to the latest version. Specifically, for NVIDIA 30-series and 40-series cards, there were known bugs with HDR10 mapping on 4K 60Hz displays that were patched in later Game Ready drivers.
• Check HDMI Port: The EW3270U has multiple ports. Ensure you are using the primary HDMI port (HDMI 1), as some users report stability issues with HDR handshaking on the secondary ports.

Heads Up

• Panel Limitation: Remember that the EW3270U is an IPS panel with a global backlight. It cannot achieve "true blacks" like an OLED; in a dark room, the "grey" you see may be the natural glow of the backlight (IPS glow), which is more apparent in HDR mode.
• Power Saving: Disable "Eco Mode" in the monitor OSD. Eco mode aggressively caps the brightness, which fights against the HDR signal and makes the screen look dim.
• Cabling: If you are using a DisplayPort to HDMI adapter, HDR will likely not work or will look washed out. Use a direct HDMI to HDMI connection for the most stable HDR experience on this model.