How do I know if my monitor has true HDR?

True HDR requires at least 600 nits peak brightness and local dimming zones. VESA DisplayHDR 600 and above certifications indicate meaningful HDR. DisplayHDR 400 is the minimum certification and shows only minor improvement over SDR in practice.

What is the difference between HDR10 and Dolby Vision?

HDR10 is an open standard using static metadata (one peak brightness value for the entire video). Dolby Vision is licensed and uses dynamic metadata, adjusting brightness settings scene by scene or frame by frame for better optimization.

Why does HDR look washed out on my monitor?

This usually means your monitor does not have sufficient peak brightness or local dimming for HDR content. When HDR is enabled on a low-brightness monitor, the system tone-maps the HDR signal down, which can crush highlights and lift blacks, making content look washed out.

What nits do I need for HDR?

For impactful HDR, 600 nits minimum with local dimming. 1000+ nits delivers the full HDR experience. 400 nits (HDR400 certification) is technically HDR but visually similar to SDR in most content.

Should I enable HDR in Windows?

Only if your monitor is genuinely HDR capable (HDR600 or above) and you are watching HDR video or playing an HDR game. Enabling Windows HDR on an HDR400 or SDR monitor degrades the look of standard content.

HDR Monitor Test: How to Check If Your Display Is Truly HDR

What Is HDR on a Monitor?

HDR (High Dynamic Range) describes a display that can simultaneously show much brighter highlights and much darker shadows than a standard SDR (Standard Dynamic Range) monitor. In the real world, bright sunlight can be hundreds of times brighter than a shaded area in the same scene. Standard monitors compress this into a narrow range. HDR monitors can show more of that difference.

True HDR requires three things:

High peak brightness: 600-1000+ nits for highlights

Deep blacks: Very low black level, ideally below 0.01 nits (requiring local dimming or OLED)

Wide color gamut: At least 90% DCI-P3 for HDR color volume

HDR Certifications Explained

VESA's DisplayHDR certifications give a quick read on actual HDR capability:

Certification	Peak Brightness	Local Dimming	Assessment
DisplayHDR 400	400 nits	Not required	Minimal HDR benefit
DisplayHDR 600	600 nits	Required	Good HDR performance
DisplayHDR 1000	1000 nits	Required	Excellent HDR
DisplayHDR 1400	1400 nits	Required	Premium HDR
DisplayHDR True Black 400	400 nits	OLED/per-pixel	True blacks
DisplayHDR True Black 600	600 nits	OLED/per-pixel	Excellent

DisplayHDR 400 is the most common budget HDR claim. It requires only 400 nits peak brightness and no local dimming. Content on a DisplayHDR 400 monitor may look slightly brighter in peak highlights but the experience is similar to SDR.

DisplayHDR 600 and above starts to deliver a meaningful HDR experience. Local dimming allows bright highlights and dark shadows to coexist in the same frame.

How to Test Your HDR Monitor

Test 1: HDR Peak Brightness

Run the ScreenLab Backlight Test or open a full-white window. In HDR mode with content that specifies high peak luminance, your monitor should hit its rated peak. If the screen looks no brighter than SDR, your display may not be engaging HDR boost mode.

Test 2: Black Level

Open a full-black test window in a darkened room. On a monitor with full-array local dimming or OLED, the black areas should be completely dark. On an edge-lit monitor, you will see backlight bleed at the edges and blooming around bright objects on dark backgrounds.

Test 3: Highlight Roll-off

Watch HDR10 content with blown-out highlights (like sunlight or specular reflections). On a true HDR monitor, these should look naturally bright without clipping. On an HDR400 monitor, highlights will clip at the same level as SDR.

Test 4: Shadow Detail

HDR content also carries more shadow information than SDR. On a capable monitor, dark scenes should show detail in the deepest shadows while bright areas remain bright. On a low-end HDR monitor, this shadow detail may be crushed.

HDR Formats: HDR10, HDR10+, Dolby Vision, HLG

HDR10: The baseline open standard. Uses static metadata set once for an entire video file. Compatible with almost all HDR displays and content.

HDR10+: Extended HDR10 with dynamic metadata. Samsung-developed, scene-by-scene optimization. Less common than Dolby Vision.

Dolby Vision: Licensed, dynamic metadata, frame-by-frame tone mapping. Best implementation quality. Requires licensed hardware.

HLG (Hybrid Log Gamma): Designed for live broadcast. SDR-compatible: HDR devices show HDR; SDR devices show SDR automatically.

For gaming, HDR10 is the universal standard. Most monitors support HDR10; Dolby Vision is primarily a TV and MacBook feature.

HDR in Windows vs HDR in Games

Windows has two separate HDR modes that are often confused:

Windows HDR (Auto HDR / Windows HD Color): Enables HDR output from Windows. When on, Windows sends an HDR signal to the monitor. SDR applications are tone-mapped up. Looks good on genuine HDR monitors; looks wrong on SDR monitors.

In-game HDR: Individual games implement HDR rendering. This is independent of Windows HDR and gives the best results because the game engine controls the full HDR pipeline.

Best practice: Enable Windows HDR only if your monitor is DisplayHDR 600 or above. Use per-game HDR settings to calibrate brightness for each game.

Common HDR Problems and Fixes

HDR looks washed out: Your monitor lacks sufficient brightness/local dimming. HDR content is being tone-mapped badly. Try disabling HDR or adjusting the in-game HDR brightness slider.

Colors look oversaturated in HDR: Check that your game's HDR color space output matches your monitor's gamut setting.

HDR causes flickering: This is a known Windows issue with some DisplayPort and HDMI combinations. Try disabling Variable Refresh Rate or checking HDMI version compatibility (HDR at 4K 120Hz requires HDMI 2.1 or DisplayPort 1.4).

HDR only available at lower refresh rates: HDR requires higher bandwidth. 4K HDR at 144Hz requires HDMI 2.1. At 1440p or 1080p, DisplayPort 1.4 handles it.

Is HDR Worth It for Gaming?

On a DisplayHDR 600+ monitor with a capable GPU, yes. Properly implemented HDR in games provides a more immersive visual experience, with fire that actually looks bright and night scenes with visible shadow detail.

On a DisplayHDR 400 monitor, the improvement is marginal and enabling HDR may make some SDR content look worse. The threshold for a noticeable HDR benefit is approximately 600 nits peak with local dimming.