DisplayPort

DisplayPort is a digital display interface standard developed and maintained by the Video Electronics Standards Association (VESA). It carries video, audio, and auxiliary data over a single cable from a source such as a computer graphics card to a display such as a monitor or a head-mounted display. VESA approved the first version, DisplayPort 1.0, on 3 May 2006, and the standard is royalty-free to implement.

DisplayPort competes with HDMI as the main interface for PC displays, and it is the dominant wired video link for PC-tethered virtual reality headsets. Headsets including the Oculus Rift S, the HTC Vive Pro, the Valve Index, the Varjo Aero, and the PC mode of the PlayStation VR2 all carry their per-eye image to the headset over DisplayPort, either through a full-size connector, a Mini DisplayPort connector, or DisplayPort Alt Mode running over a USB-C cable.

How it works

DisplayPort sends data as packets, similar to a network or USB link rather than the fixed timing of older analog and DVI-style interfaces. The connection has two parts: a high-speed unidirectional Main Link that carries the video and audio, and a low-speed bidirectional AUX channel used for link configuration, device identification (over a protocol related to DisplayID and EDID), and side-band control. The Main Link is divided into lanes, with one, two, or four lanes available depending on the device and cable.

Each version of DisplayPort defines a set of link rates per lane. Early versions used 8b/10b encoding, in which 8 bits of data are sent as a 10-bit symbol; this carries an overhead of 20 percent, so the usable data rate is 80 percent of the raw signaling rate. DisplayPort 2.0 introduced 128b/132b encoding, which lowers the overhead to about 3 percent and raises efficiency to roughly 97 percent.

The named link rates are:

Link rate	Per-lane signaling	Four-lane raw rate	Introduced in
RBR (Reduced Bit Rate)	1.62 Gbit/s	6.48 Gbit/s	DisplayPort 1.0
HBR (High Bit Rate)	2.70 Gbit/s	10.80 Gbit/s	DisplayPort 1.0
HBR2	5.40 Gbit/s	21.60 Gbit/s	DisplayPort 1.2
HBR3	8.10 Gbit/s	32.40 Gbit/s	DisplayPort 1.3
UHBR 10	10.0 Gbit/s	40.00 Gbit/s	DisplayPort 2.0
UHBR 13.5	13.5 Gbit/s	54.00 Gbit/s	DisplayPort 2.0
UHBR 20	20.0 Gbit/s	80.00 Gbit/s	DisplayPort 2.0

The raw rate is the signaling rate before encoding overhead. After 8b/10b encoding, HBR3's 32.4 Gbit/s raw rate yields about 25.92 Gbit/s of usable data; after 128b/132b encoding, UHBR 20's 80 Gbit/s raw rate yields about 77.37 Gbit/s of usable data.

Version history

VESA approved DisplayPort 1.0 on 3 May 2006, with version 1.1 ratified on 2 April 2007 and 1.1a on 11 January 2008. Version 1.2 was published on 7 January 2010 and roughly doubled the per-lane rate with HBR2. Version 1.3 was approved on 15 September 2014 and added the HBR3 rate. Version 1.4 was published on 1 March 2016 and added support for Display Stream Compression; version 1.4a followed in April 2018. VESA released DisplayPort 2.0 on 26 June 2019, introducing the UHBR link rates and 128b/132b encoding.

Version	Release	Highest link rate	Max total raw rate	Max usable data rate
1.0 to 1.1a	2006-2008	HBR	10.80 Gbit/s	8.64 Gbit/s
1.2 to 1.2a	2010-2013	HBR2	21.60 Gbit/s	17.28 Gbit/s
1.3	2014	HBR3	32.40 Gbit/s	25.92 Gbit/s
1.4 to 1.4a	2016-2018	HBR3	32.40 Gbit/s	25.92 Gbit/s
2.0 to 2.1a	2019-present	UHBR 20	80.00 Gbit/s	77.37 Gbit/s

VESA released the DisplayPort 2.1 specification on 17 October 2022. It is backward compatible with and supersedes DisplayPort 2.0, and it does not change the maximum link rates; instead it tightens alignment with the USB Type-C and USB4 PHY specifications so that a common physical layer can serve both DisplayPort and USB4. DisplayPort 2.1 also defined certified cable classes: a DP40 cable supports up to the UHBR 10 link rate across four lanes for 40 Gbit/s total, and a DP80 cable supports up to UHBR 20 across four lanes for 80 Gbit/s total, with the specification requiring DP40 cables to hold UHBR performance beyond two meters and DP80 cables beyond one meter. A later update, DisplayPort 2.1a, added a DP54 cable class that supports the UHBR 13.5 link rate (54 Gbit/s total) over a two-meter passive cable.

Connectors

DisplayPort uses a 20-pin interface that appears in three common physical forms. The full-size DisplayPort connector measures about 16.10 mm wide and includes a friction-lock latch on many cables. The Mini DisplayPort connector, introduced by Apple in 2008, uses the same 20-pin signaling in a connector about 7.50 mm wide. The third form is DisplayPort Alt Mode, in which DisplayPort signals are carried over a reversible USB-C connector; depending on configuration, one, two, or all four of the cable's high-speed pairs can be assigned to DisplayPort lanes, with the remaining pairs available for USB data. The choice of connector matters for VR because tethered headsets ship with different plugs: the Valve Index terminates in a full-size DisplayPort plus a USB-C connector, while the PC adapter for the PlayStation VR2 takes a DisplayPort cable on the PC side and a USB-C connector on the headset side.

Multi-Stream Transport

DisplayPort 1.2 added Multi-Stream Transport (MST), which multiplexes several independent video streams over one Main Link. MST lets a single port drive multiple monitors through a branching hub or through monitors that support daisy-chaining. In the headset context the related capability matters in reverse: a single high-bandwidth link must be split internally to feed two display panels, one per eye, and the available link rate caps the combined resolution and refresh rate that the two panels can run.

Display Stream Compression and VR

Display Stream Compression (DSC) is a VESA video compression scheme added as an optional feature in DisplayPort 1.4. DSC encodes the image with a fixed, low-latency algorithm that VESA describes as visually lossless, meaning that in VESA's evaluation viewers do not reliably perceive a difference between the compressed and uncompressed image even though the method is mathematically lossy. By compressing the stream, DSC lets a given link rate carry higher resolutions and refresh rates than it could otherwise.

DSC is directly relevant to virtual reality because per-eye resolution and refresh rate together set very high bandwidth demands. NVIDIA published a worked example: a hypothetical headset rendering 4000x4000 pixels per eye at 90 Hz would need about 69 Gbit/s of bandwidth, which exceeds the roughly 25.9 Gbit/s usable over DisplayPort 1.4a's HBR3 link. NVIDIA stated that DSC, with compression ratios up to 3:1, can reduce that example stream from 69 Gbit/s to about 23 Gbit/s, bringing it within the link's capacity, and that the company's Turing GPU architecture was the first to support DSC. NVIDIA presented the technique through its VRWorks Graphics SDK as a way to raise headset image fidelity over an existing DisplayPort connection.

Use in virtual reality and augmented reality

PC-tethered VR headsets render frames on a discrete graphics card and must deliver two synchronized images, one per eye, at a high frame rate and low latency. DisplayPort is the usual carrier for that data on Windows PCs because its packetized Main Link and high link rates suit the wide, fast video signal a headset needs. The interface appears across the PC-Powered VR product line:

• The original Oculus Rift CV1 (2016) used an HDMI cable for video and a separate USB cable for data, an exception to the DisplayPort pattern.
• The Oculus Rift S (2019) switched to a single DisplayPort connection for video alongside a USB connection, and its firmware does not start the DisplayPort link unless the USB 3.0 connection is also working.
• The HTC Vive Pro connects with a DisplayPort cable, a USB 3.0 cable, and a power cable through a link box, and the HTC Vive Cosmos link box uses DisplayPort rather than the HDMI of the first-generation Vive.
• The Valve Index (2019) drives two 1440x1600 LCD panels at up to 120 Hz, with an experimental 144 Hz mode, over DisplayPort plus USB.
• The Varjo Aero (2021) renders 2880x2720 per eye at 90 Hz and requires a DisplayPort 1.4 output plus a USB 3.0 port, connected through a breakout box that also carries power.
• The PlayStation VR2, originally a PlayStation 5 accessory, gained official PC support on 7 August 2024 through a Sony PC adapter that connects to the computer over USB Type-A and a DisplayPort 1.4 cable. Sony states that the adapter needs a native DisplayPort 1.4 output and that USB-C to DisplayPort adapters are not officially supported, which excludes many laptops.

Standalone headsets that run their own processor, such as the Meta Quest line, do not need an external display interface to show their own content, but DisplayPort still appears at their USB-C ports. A Meta Quest software update (v74, released 18 February 2025) added DisplayPort Alt Mode video output, letting a Quest send its view to an external TV or monitor over a USB-C DisplayPort connection. Meta describes this wired path as offering higher resolution and lower latency than wireless casting because it does not depend on a Wi-Fi network.

The Apple Vision Pro (2024) is a standalone headset and does not use DisplayPort to receive its own image. Its optional Developer Strap exposes a wired data port over USB-C for development workflows; a 2025 revision of that strap raised the port's data rate to 20 Gbit/s, but the strap is a data and debugging link rather than a DisplayPort video input to the headset.

VirtualLink

VirtualLink was a proposed single-cable connection standard for VR headsets, announced in 2018 by a consortium that included NVIDIA, AMD, Microsoft, Valve, Oculus, and HTC. It defined a USB-C Alternate Mode that combined four HBR3 DisplayPort lanes for video, a USB 3.1 data channel for the headset's onboard cameras and sensors, and up to 27 watts of power, with the aim of replacing the multiple cables that tethered headsets then used. NVIDIA's RTX 20-series graphics cards from 2018 shipped with a USB-C port that supported VirtualLink. The standard did not gain adoption: NVIDIA's RTX 30-series cards (2020) dropped the USB-C port, and the VirtualLink consortium abandoned the effort by September 2020.

Current status

DisplayPort 2.1 (and its 2.1a update) is the current published version as of 2026, with UHBR 20 the highest defined link rate at 80 Gbit/s total across four lanes. The cable program (DP40, DP54, DP80) and the convergence with the USB4 physical layer mean DisplayPort increasingly reaches devices through USB-C rather than a dedicated socket, which suits the USB-C-centric design of standalone XR hardware. For PC-tethered VR, DisplayPort 1.4 with DSC remains the common requirement on current and recent headsets, because that combination supplies enough bandwidth for high per-eye resolution at 90 Hz and above.