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posted by chromas on Thursday June 27 2019, @12:50AM   Printer-friendly

VESA Announces DisplayPort 2.0 Standard: Bandwidth For 8K Monitors & Beyond

While display interface standards are slow to move, at the same time their movement is inexorable: monitor resolutions continue to increase, as do refresh rates and color depths, requiring more and more bandwidth to carry signals for the next generation of monitors. Keeping pace with the demand for bandwidth, the DisplayPort standard, the cornerstone of PC display standards, has now been through several revisions since it was first launched over a decade ago. And now this morning the standard is taking its biggest leap yet with the release of the DisplayPort 2.0 specification. Set to offer nearly triple the available bandwidth of DisplayPort 1.4, the new revision of DisplayPort is almost moving a number of previously optional features into the core standard, creating what's in many ways a new baseline for the interface.

The big news here, of course, is raw bandwidth. The current versions of DisplayPort – 1.3 & 1.4 – offer up to 32.4 Gbps of bandwidth – or 25.9 Gbps after overhead – which is enough for a standard 16.7 million color (24-bit) monitor at up to 120Hz, or up to 98Hz for 1 billion+ (30-bit) monitors. This is a lot of bandwidth, but it still isn't enough for the coming generation of monitors, including the likes of Apple's new 6K Pro Display XDR monitor, and of course, 8K monitors. As a result, the need for more display interface bandwidth continues to grow, with these next-generation monitors set to be the tipping point. And all of this is something that the rival HDMI Forum has already prepared for with their own HDMI 2.1 standard.

DisplayPort 2.0, in turn, is shooting for 8K and above. Introducing not just one but a few different bitrate modes, the fastest mode in DisplayPort 2.0 will top out at 80 Gbps of raw bandwidth, about 2.5 times that of DisplayPort 1.3/1.4. Layered on that, DisplayPort 2.0 also introduces a more efficient coding scheme, resulting in much less coding overhead. As a result, the effective bandwidth of the new standard will peak at 77.4 Gbps, with at 2.98x the bandwidth of the previous standard is just a hair under a full trebling of available bandwidth.

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  • (Score: 3, Informative) by takyon on Thursday June 27 2019, @01:00AM (2 children)

    by takyon (881) <> on Thursday June 27 2019, @01:00AM (#860320) Journal

    AnandTech article could have listed more resolution combos. Here's some more:

    DisplayPort 2.0 has enough bandwidth for a 16K resolution display []

    DP 2.0 fattens the pipe considerably, and can support the following setups:

    One 16K (15360x8460) display @ 60Hz and 30 bpp 4:4:4: HDR (with DSC)
    One 10K (10240x4320) display @ 60Hz and 24 bpp 4:4:4 (no compression)
    Two 8K (7680x4320) displays @ 120Hz and 30 bpp 4:4:4: HDR (with DSC)
    Two 4K (3840x2160) displays @ 144Hz and 24 bpp 4:4:4 (no compression)
    Three 10K (10240x4320) displays @ 60Hz and 30 bpp 4:4:4: HDR (with DSC)
    Three 4K (3840x2160) displays @ 90Hz and 30 bpp 4:4:4: HDR (no compression)

    Those are all through the native DisplayPort connector. If going through USB-C as enabled by DisplayPort Alt Mode (which allows for simultaneous SuperSpeed USB data and video), the upgraded spec enables the following:

    Three 4K (3840x2160) displays @ 144Hz and 30 bpp 4:4:4 HDR (with DSC)
    Two 4Kx4K (4096x4096) displays (for AR/VR headsets) @ 120Hz and 30 bpp 4:4:4 HDR (with DSC)
    Three QHD (2560x1440) @ 120Hz and 24 bpp 4:4:4 (no compression)
    One 8K (7680x4320) display @ 30Hz and 30 bpp 4:4:4 HDR (no compression)

    This fun site reckons 1080p @ 1000 Hz is possible, even without Display Stream Compression (DSC):

    DisplayPort 2.0 Announced: Enough Bandwidth for 1000 Hz Future []

    1080p 1000 Hz SDR
    1080p 1000 Hz HDR with Display Stream Compression
    1440p 1000 Hz SDR with Display Stream Compression

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  • (Score: 2, Funny) by Anonymous Coward on Thursday June 27 2019, @02:56AM

    by Anonymous Coward on Thursday June 27 2019, @02:56AM (#860361)

    DP 2.0 fattens the pipe considerably

    I suspect it fattens both pipes, especially the one in the rear.

  • (Score: 1, Interesting) by Anonymous Coward on Thursday June 27 2019, @02:30PM

    by Anonymous Coward on Thursday June 27 2019, @02:30PM (#860526)

    More useful : multiple streams, so you can daisy chain monitors together without sacrificing resolution. This is useful for everyone for cable management, but especially for laptops and projectors where it's not practical to have too many connectors.