In this guide
DisplayPort 1.4 delivers up to 32.4 Gbps for 4K@120Hz or 8K@60Hz, while DisplayPort 2.0 triples bandwidth to ~80 Gbps, enabling 4K@240Hz, 8K@120Hz, or even 16K@60Hz — but you need matching hardware and the right cable to hit those speeds.
- Both GPU and monitor support the same DP version
- You use a DP80-certified cable for DisplayPort 2.0
- DSC is enabled for high-resolution or high-refresh targets
- Your monitor only supports DP 1.4 — a DP 2.0 GPU caps at 1.4 limits
- You use an uncertified or older cable, causing signal loss at UHBR rates
- DSC is disabled or unsupported, blocking maximum resolution or refresh
Bandwidth: The Core Difference
DisplayPort 1.4 uses HBR3 signaling at 32.4 Gbps total. That’s enough for 4K at 120Hz or 8K at 60Hz — both requiring DSC 1.2 compression to fit within the bandwidth envelope.
DisplayPort 2.0 introduces UHBR (Ultra High Bit Rate) modes reaching up to 80 Gbps. That’s nearly three times the throughput, making uncompressed 4K@144Hz possible and pushing DSC-assisted 4K@240Hz or 8K@120Hz into reach for the first time.
Resolution and Refresh Rate Comparison
| Setup | Works? | Need | Note |
|---|---|---|---|
| 4K@120Hz on DP 1.4 | Yes | DSC enabled | Compressed signal |
| 8K@60Hz on DP 1.4 | Yes | DSC enabled | Compressed signal |
| 4K@240Hz on DP 2.0 | Yes | DP80 cable + DSC | Requires DP 2.0 display |
| 8K@120Hz on DP 2.0 | Yes | DP80 cable + DSC | Requires DP 2.0 display |
| DP 2.0 GPU + DP 1.4 monitor | Partial | Standard DP cable | Capped at DP 1.4 limits |
Cable Requirements
A standard DP 1.4 cable handles all HBR3 bandwidth without issue. For DisplayPort 2.0, you need a DP40 or DP80 certified cable to carry UHBR10 or UHBR20 signal rates. Using an older cable with a DP 2.0 setup will cause the connection to fall back to lower speeds or drop the signal entirely.
Check the VESA DisplayPort FAQ for certified cable specifications and the full list of supported UHBR modes.
Does Your GPU or Monitor Support DP 2.0?
As of 2024, DisplayPort 2.0 support is limited. Most current GPUs still ship with DP 1.4 outputs. Only a small number of high-end monitors and newer AMD and Intel Arc GPUs include DP 2.0. If you’re unsure whether your setup uses USB-C with DisplayPort Alt Mode, see whether USB-C supports video output — some USB-C ports carry DP 2.0 signal.
If you’re running a mixed setup — like a DP 2.0 GPU into a DP 1.4 monitor — the connection will negotiate down automatically. You won’t get errors, but you won’t get DP 2.0 performance either. For adapters between standards, check how USB-C to HDMI connections work as a comparison for how version negotiation behaves.
Which Version Do You Actually Need?
- Running 1080p or 1440p at up to 165Hz — DP 1.4 is more than enough
- Running 4K at 120Hz — DP 1.4 works with DSC
- Running 4K at 144Hz uncompressed or 240Hz — you need DP 2.0 end to end
- Running 8K at 120Hz — DP 2.0 only
Bottom line: For most users today, DisplayPort 1.4 covers every practical resolution and refresh rate up to 4K@120Hz. DisplayPort 2.0 is the future-proof option for 4K@240Hz and beyond, but it requires a DP 2.0 GPU, a DP 2.0 monitor, and a DP80-certified cable — all three, or you won’t see any benefit.