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  1. Member
    Join Date: Feb 2010
    Location: Bavaria
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    Hi,
    can somebody tell me specs of Displayport with the different Revisions like 1.1, 1.1a, 1.2, 1.2a? I need to know supportet resolutions and refresh rate of each Revision.
    I haven't found what I need, only posts in other forums and everyone said something different there.

    Thanks
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  2. I think the reason you are having trouble is because the spec doesn't delineate resolutions and refresh rates, just the total bandwidth.

    http://en.wikipedia.org/wiki/Displayport

    You can approximate bandwidth by

    Code:
    width * height * refresh_rate * bits_per_pixel * 1.1
    The final 1.1 is to account for vertical refresh, front and back porch, etc. So for 1920x1080, 60 Hz, 8 bit RGB:

    Code:
    1920 * 1080 * 60 * 24 * 1.1 ~= 3.3 Gb/s
    Of course, devices will not support all possible combinations.
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  3. Member
    Join Date: Feb 2010
    Location: Bavaria
    Search PM
    Thanks jagabo, that helped me a lot.

    For UHD (3840 x 2160):
    3840 x 2160 x 60 x 24 x 1,1 ~= 13,2Gb/s

    Do you know the difference between 1.2 and 1.2a?
    I read a review of a 4K TV (should be called UHD, 4K is 4096x2304) and they talked about Displayport 1.2a.
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