In this guide
HDR (High Dynamic Range) is a video technology that delivers richer contrast, brighter highlights, and deeper color than standard video — and your cable supports it if it’s HDMI 2.0a or newer, or DisplayPort 1.4 or newer.
- Cable is HDMI 2.0a/2.1 or DisplayPort 1.4/2.0+
- Cable supports at least 18 Gbps bandwidth
- Both source and display are HDR-capable (400+ nits)
- HDR is enabled in your device settings
- Cable is HDMI 1.4 or older DisplayPort version
- Cable is low-quality and causes signal loss
- Your TV or monitor does not support HDR
- HDR formats are mismatched (e.g. Dolby Vision source on HDR10-only display)
What HDR Actually Does
Standard video (SDR) tops out around 100 nits of brightness. HDR pushes that to 1,000–2,000+ nits, and pairs it with 10-bit color depth for smoother gradients and more accurate colors. The result is more visible detail in shadows and bright areas — not just a brighter picture.
Common HDR formats include HDR10 (the baseline standard), Dolby Vision (dynamic metadata, higher quality), and HLG (used in broadcast). Each requires your cable, source, and display to all be compatible.
Which Cables Support HDR
| Setup | Works? | Need | Note |
|---|---|---|---|
| HDMI 2.0a to HDR TV | Yes | 18 Gbps cable | Supports HDR10 and HLG at 4K/60Hz |
| HDMI 2.1 to HDR TV | Yes | 48 Gbps cable | Supports all formats including Dolby Vision at 4K/120Hz |
| DisplayPort 1.4 to HDR monitor | Yes | DP 1.4 cable | Supports HDR10 at 4K/60Hz |
| HDMI 1.4 to HDR TV | No | Upgrade cable | Insufficient bandwidth for HDR data |
| Any cable, non-HDR display | No | HDR-capable display | Cable doesn’t matter if screen can’t show HDR |
How to Check Your Cable
Look for “High Speed HDMI” or “HDMI 2.0” printed on the cable or its packaging. If you’re unsure, check whether your TV or monitor recognizes an HDR signal — most will show an HDR indicator on screen when it’s active. You can also check your display’s specs for peak brightness; anything under 400 nits will produce a poor HDR result even with the right cable.
If you’re connecting via USB-C, the cable needs to carry the right alternate mode signal. See whether USB-C can connect to HDMI and what that means for video quality.
For a deeper look at video over USB-C, check if your USB-C cable supports video before assuming HDR will pass through.
HDR Format Mismatch
Even with the right cable, HDR can fail if formats don’t match. A Dolby Vision source connected to an HDR10-only display will usually fall back to HDR10 or SDR — not an error, but not the full quality either. Check your source device’s HDR output settings and match them to what your display supports. VESA’s DisplayPort 2.1 specification details how newer standards handle HDR bandwidth requirements.
Bottom line: HDR is a chain — your cable, source, and display all need to support it. Use HDMI 2.0a or newer (18 Gbps) or DisplayPort 1.4+ and make sure HDR is switched on in settings. If any link in that chain is missing, you’ll get SDR even on a cable that looks fine.