DeckLink 8K Pro

Sorry for this is a amateur question but, in order to get the 4-4k synced outputs out of the decklink, what are my hardware options to use this decklink? I know it will work in a mac pro tower situation but, is there any way I could use this in a TB3 enclosure with a mac computer like a Sonnet?


  • It'll work in an external TB3 enclosure, but only at 30fps; there isn't enough bandwidth over Thunderbolt to transfer 4x 4K60 framebuffers.

    Up to 2x 2160p60 will work over TB3.

  • Ok I got the BMD deck link 8k Pro in a Sonnett TB3 enclosure and I downloaded the "Desktop Video Setup" software. What settings should I be at to get the 4 - 4k 30fps in the BMD desktop video and Millumin?

  • Hello @rosigalloway,

    Use the 4320p mode to output to 4 SDI at once. More info in this article.

    Best. Philippe

  • Ok I don't know what I am doing wrong but, I have a Mac Studio M2 Max and I have the BMD Deck Link 8k Pro via a Sonnett thunderbolt housing. In the Black Magic app I have set it to "SDI 1 to 4 in and out" and I on the 1st SDI default video resolution settings I have have set it to 4320 30. So, what else do I have to do in the BMD software and what exactly do you do in Millumin to get 4 4k's outputting frame synced out of each SDI because it's not working now. Thank you and I hope you can help and sorry for this long explanation.

  • Hello @rosigalloway,

    This is nothing more to do.

    You should check that your Decklink 8K Pro is working correctly in Blackmagic Media Express, then tell what exactly do not work in Millumin (black outputs ? not frame-sync ?).

    Best. Philippe

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