HDMI 2.1 vs DisplayPort 2.1: which display cable should you use?
The modern high-end display-cable choice that matters for 4K 240 Hz and beyond.
DisplayPort 2.1 UHBR 20 delivers 77.4 Gbps of effective data rate — 82% more than HDMI 2.1's 42.6 Gbps. That extra headroom is why DP 2.1 carries 4K 240 Hz HDR natively while HDMI 2.1 needs Display Stream Compression (DSC) for the same mode. Both interfaces use the same compression technology when they need to, and DSC is VESA-certified visually lossless — but the uncompressed path matters for lowest-latency competitive gaming.
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Side-by-side specs
| Spec | HDMI 2.1 (48G) | DisplayPort 2.1 (UHBR 20) |
|---|---|---|
| Max effective data rate | 42.6 Gbps | 77.4 Gbps (better on this spec) |
| 4K 60 Hz (10-bit 4:4:4) | Native | Native |
| 4K 144 Hz HDR (10-bit 4:4:4) | Native (40.1 Gbps) | Native |
| 4K 240 Hz HDR (10-bit 4:4:4) | DSC required | Native (better on this spec) |
| 8K 60 Hz HDR | DSC required | Native (better on this spec) |
| Adaptive sync | VRR / AMD FreeSync / Nvidia G-Sync | AMD FreeSync / Nvidia G-Sync |
| Max reliable passive cable length | ~3 metres (better on this spec) | ~1 metre (UHBR 20) |
| Audio return (eARC) | Yes (for TVs) | No |
| Console support | Universal (better on this spec) | None |
| Current PC GPU support | All modern GPUs (better on this spec) | RTX 50 / RX 9000+ |
| Best for 4K TV | Yes (better on this spec) | — |
| Best for high-end gaming monitor | Capable | Best (better on this spec) |
How they differ
The cables are physically different and not interchangeable. HDMI 2.1 dominates TV and console connections — PS5, Xbox Series X, and every 4K 120 Hz TV ship HDMI 2.1 inputs. DisplayPort 2.1 is the PC-side choice: flagship gaming monitors announce in 2025-2026 as DP 2.1 UHBR 20 capable, and current RTX 50-series and RX 9000-series GPUs support it. DP 2.1 UHBR 20 is also limited to short cable runs (typically under 1 metre passive; 3 metres with an active/fibre cable). HDMI 2.1 reaches further reliably at its lower bit rate. On audio, HDMI still has broader surround-sound format support and eARC for TV setups; DP focuses on display data and uses separate audio channels that work well for PC use but aren't native for home-theatre receivers.
Verdict
Use HDMI 2.1 for TV, console, and home theatre. Use DisplayPort 2.1 for PC-to-monitor connections, especially on high-refresh gaming monitors. For GPU-to-monitor at 4K 240 Hz and above, DP 2.1 UHBR 20 is the only option that runs uncompressed on current hardware.
Check HDMI 2.1 for 4K 144 HzWhich should you pick?
Choose HDMI 2.1 (48G)
Pick HDMI 2.1 for connections to 4K TVs, game consoles (PS5 / Xbox Series X), AV receivers, and any run longer than about 2 metres. Also pick it for any living-room use where eARC audio matters.
Check HDMI 2.1 at 4K 120 HzChoose DisplayPort 2.1 (UHBR 20)
Pick DisplayPort 2.1 UHBR 20 for PC-to-monitor connections on new builds in 2026, especially 4K 240 Hz or 1440p 480 Hz gaming monitors. Use short (under 1 m) certified cables for UHBR 20 to avoid link instability.
Check DP 2.1 at 4K 240 HzRelated comparisons
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