What Is HDR on a Monitor? HDR400, HDR600, HDR1000 Explained

2026-04-23

Quick Answer

HDR widens both the brightness range and the color gamut a monitor can show in a single frame. VESA DisplayHDR tiers are named after peak brightness in nits, and the practical threshold is HDR600. Below that, and especially at HDR400, there is no mandatory local dimming and HDR mode often looks worse than a well tuned SDR mode.

What HDR actually does

HDR (High Dynamic Range) expands two things your monitor can display at once: brightness range and color gamut. An HDR monitor can show a bright highlight (like a sun reflection) and a deep shadow in the same frame without crushing either.

Standard Dynamic Range (SDR) content tops out around 100-250 nits of brightness and covers sRGB. HDR content can hit 1000+ nits in highlights, sink to near-zero in shadows, and use the wider DCI-P3 or BT.2020 color space.

VESA DisplayHDR tiers

VESA DisplayHDR is the most common HDR monitor certification. The number refers to peak sustained brightness in nits.

HDR400: 400 nits peak, 8-bit color, no mandatory local dimming. Entry level - marketing label more than a real HDR experience.

HDR500: 500 nits peak, 10-bit color, wide color gamut required. Step up from HDR400.

HDR600: 600 nits peak, 10-bit, local dimming required. Noticeable HDR impact starts here.

HDR1000: 1000 nits peak, 10-bit, real local dimming. Full HDR experience.

HDR1400: 1400 nits peak, top-tier LCD HDR.

For OLED:

HDR True Black 400: 400 nits peak with absolute pixel-level black. Looks more impactful than HDR1000 LCD in dark rooms.

HDR True Black 500 / 600: newer OLED panels with higher sustained brightness.

HDR10, HDR10+, and Dolby Vision

These are the transport formats that carry HDR metadata to your monitor.

HDR10: royalty-free baseline. Static metadata for the whole file. Supported everywhere.

HDR10+: dynamic metadata per scene. Better tone mapping on dimmer displays.

Dolby Vision: dynamic metadata per frame. Requires Dolby licensing. Best tone mapping quality.

Most Windows, macOS, and game HDR outputs use HDR10. Dolby Vision support on PC is still limited.

Do you need HDR?

Yes, HDR helps

Gaming titles with native HDR (Cyberpunk 2077, Horizon, Forza, etc.)

Streaming HDR movies (Netflix, Disney+, Apple TV)

Video and photo color grading for HDR deliverables

Anyone watching in a dimmer room where OLED blacks can shine

Not really

Office work, browsing, document editing

Gaming in bright rooms where HDR contrast is washed out

Anyone on HDR400 - the experience is basically SDR with a certification sticker

Avoid the HDR400 trap

HDR400 monitors are marketed as "HDR" but they offer:

No local dimming

8-bit color (sometimes 8-bit + FRC)

Peak brightness only slightly above SDR

On an HDR400 monitor, HDR mode often looks worse than a well-tuned SDR mode because the panel cannot physically deliver what HDR content expects.

For a real HDR experience on LCD, HDR600 is the practical minimum. On OLED, any HDR True Black tier gives a great HDR experience thanks to infinite contrast.

How to test HDR on your monitor

Run our HDR Monitor Test to check what your browser and display report.

Open Windows HDR calibration (Settings > Display > HDR) or macOS HDR preferences to see reported peak nits.

Play an HDR clip like the Microsoft HDR YouTube sample. If bright highlights pop and shadows stay dark without crushing, HDR is working.

If the image looks washed out in HDR mode, either your monitor is too dim (HDR400 class) or your OS HDR settings need calibration.

Bottom line

HDR on a monitor means real contrast expansion, not a marketing sticker. Target HDR600+ on LCD or any HDR True Black OLED. Pair it with HDR-native content, and you will actually see the difference.

Frequently Asked Questions

What is the difference between HDR400, HDR600 and HDR1000?

HDR400 means 400 nits peak, 8-bit color and no mandatory local dimming. HDR600 means 600 nits peak, 10-bit color and required local dimming, which is where HDR starts to be noticeable. HDR1000 means 1000 nits peak with real local dimming and delivers the full HDR experience.

Is an HDR400 monitor worth buying for HDR?

Not for HDR itself. HDR400 panels have no local dimming, 8-bit color and peak brightness only slightly above SDR. HDR mode on such a panel often looks worse than SDR because the display cannot deliver what the content expects.

Is OLED HDR True Black 400 better than an HDR1000 LCD?

In a dark room it often is. True Black certification is OLED specific and delivers absolute pixel level black, which produces more perceived contrast than a brighter LCD limited by backlight zones. In a bright room the higher peak brightness of the LCD has the advantage.

What is the difference between HDR10, HDR10+ and Dolby Vision?

HDR10 is the royalty free baseline and uses static metadata for a whole file. HDR10+ adds dynamic metadata per scene for better tone mapping on dimmer displays. Dolby Vision uses dynamic metadata per frame and requires licensing. Windows, macOS and game output mostly use HDR10.

Do I need HDR for office work?

No. HDR benefits native HDR games, streaming HDR movies and HDR color grading. For documents, browsing and spreadsheets it adds nothing, and in a bright room HDR contrast is washed out anyway.

What is HDR mode on a monitor?

HDR mode is a display setting that switches the panel to a wider brightness range and color gamut so it can show the extra highlight and shadow detail encoded in HDR content. It only helps if the content is HDR and the panel meets a real HDR tier like HDR600 or above; on an HDR400 panel it often looks worse than SDR mode.

What does HDR600 mean on a monitor?

HDR600 is a VESA DisplayHDR certification requiring 600 nits peak brightness, 10-bit color and local dimming. It is the tier where HDR starts to look meaningfully different from SDR, unlike HDR400 which has no mandatory local dimming.

How is HDR brightness measured?

HDR brightness is measured in nits (candelas per square meter) and reported as a peak value, usually sustained only over a small area of the screen for a few seconds. VESA DisplayHDR tiers (400, 600, 1000, 1400) set minimum peak brightness plus requirements like bit depth and local dimming, so two monitors with the same nits number can look very different.