What Is HDR on a Monitor? HDR10, DisplayHDR 400 and the Labels on the Box
HDR on a PC monitor explained: what HDR10 and DisplayHDR tiers mean, whether HDR400 is worth it, why local dimming matters and how to set HDR up in Windows.
Is the HDR sticker on that monitor box worth anything? Sometimes a lot, sometimes very little. HDR, or high dynamic range, lets games and videos describe much brighter highlights, deeper shadows and richer colour than standard content. A monitor that "supports HDR" can read that signal, but how much of the extra range you actually see depends on how bright the panel gets and how well it can keep dark areas dark at the same time.
What HDR adds over standard dynamic range
Standard dynamic range, or SDR, was designed around the limits of older displays. HDR content carries more information:
- Brighter highlights. Sunlight on water, muzzle flashes and neon signs can be mastered far brighter than the rest of the scene.
- Detail at both ends. Shadows and highlights keep texture instead of turning into flat black or white.
- Wider colour. HDR usually travels with a wider colour gamut and 10-bit colour, which helps smooth gradients such as skies.
Lighting-heavy games benefit most. Ray-traced reflections and bright light sources, described in our explainer on ray tracing in games, are exactly the kind of detail HDR is built to show.
Formats and certifications are different things
Two kinds of label appear on monitor boxes, and they answer different questions.
Formats: what signal the monitor understands
HDR10 is the common baseline format for PC games and video. It uses static metadata, meaning one set of brightness instructions for the whole film or game. HDR10+ and Dolby Vision add dynamic metadata that can change scene by scene; they are common on televisions and much rarer on PC monitors.
Certifications: how well the monitor performs
VESA, the industry body behind DisplayPort, runs the DisplayHDR programme. Each tier name includes a number that refers to the peak brightness the panel must reach, measured in nits, alongside other requirements for colour, black level and bit depth.
The DisplayHDR tiers in plain terms
| Tier | What to expect |
|---|---|
| DisplayHDR 400 | Entry level. Modest brightness boost; does not require the panel to dim separate zones, so contrast often looks close to SDR |
| DisplayHDR 500 and 600 | Brighter highlights and some form of local dimming, so HDR starts to look distinct |
| DisplayHDR 1000 and 1400 | High peak brightness with stronger dimming requirements; the closest monitors get to a premium HDR TV |
| DisplayHDR True Black 400, 500 and 600 | Aimed at OLED and similar panels with near-perfect black levels; lower peak brightness, but excellent contrast |
Is HDR400 worth it?
As a bonus feature, it does no harm. As a reason to buy a particular monitor, it is weak. A DisplayHDR 400 panel will accept HDR games and videos, but without local dimming it cannot make highlights bright while keeping nearby shadows deep, and the overall look can come across as washed out or barely different from SDR. Many owners end up leaving HDR off on these screens. If HDR matters to you, look for local dimming or an OLED panel rather than the lowest tier badge.
What actually makes HDR look good
- Local dimming zones. The backlight is split into areas that brighten and dim independently. More zones generally means more precise contrast and less glow around bright objects, an effect known as blooming.
- Mini-LED backlights. Thousands of tiny LEDs allow far more zones than older edge-lit designs.
- Self-emissive pixels. On OLED panels every pixel controls its own light, so a bright star can sit next to true black.
- Sustained brightness. Some screens reach a high peak only on small highlights for a moment; how bright larger areas can stay is just as important.
Setting HDR up on a Windows PC
- Connect with a cable and port that support the resolution and refresh rate you want together with HDR; older HDMI and DisplayPort versions may force a compromise.
- Open Display settings, select the monitor and switch on the option to use HDR.
- Run the free Windows HDR Calibration app, which sets how bright and dark the system should drive the screen.
- Adjust the SDR content brightness slider so the desktop and ordinary apps do not look dim or grey.
- In each game, use its HDR calibration screen for peak brightness and paper white rather than skipping it.
Common questions
Why does everything look washed out with HDR on?
Usually because standard desktop content is being mapped into HDR. Raise the SDR content brightness slider, or switch HDR on only when launching HDR games and videos.
Does HDR lower frame rate?
It typically costs little or nothing in performance, since the extra work is mostly in how the final image is encoded. A few individual games behave differently, so compare once if you are unsure. If frame rate is the worry, settings such as DLSS-style upscaling make a far bigger difference than the HDR switch.
Does HDR change which size to buy?
Not directly, but better HDR panels are more common in larger sizes. Our guide to picking a gaming monitor size covers distance and resolution, and our explainer on monitor response time covers the motion side of the spec sheet.
