HDR Explained: What Makes a Display Actually HDR

HDR (High Dynamic Range) promises brighter highlights, deeper shadows, and richer color. The label is wildly overused.

What real HDR needs

• High peak brightness — 600+ nits to make highlights pop; 1000+ is excellent.
• High contrast / local dimming — many dimming zones (Mini-LED) or per-pixel control (OLED).
• Wide color gamut — strong DCI-P3 coverage (see our gamut guide).
• 10-bit color to avoid banding in HDR gradients.

The "fake HDR" trap

DisplayHDR 400 badges often mean a standard SDR panel that merely accepts an HDR signal — no real local dimming or extra brightness. It can look worse than SDR. Look for DisplayHDR 600/1000, or OLED.

Setting it up

• Enable HDR in the OS and the game/app.
• On Windows, run the HDR calibration app.
• HDR needs adequate cable bandwidth (HDMI 2.1 / DisplayPort).

Check the basics first

HDR leans on black level and gradients. Verify deep blacks with the Black Screen, blooming with the Blooming Test, and smooth tone transitions with the Color Gradient Test.