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Old 05-20-2019, 11:17 AM
justinhill justinhill is offline
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Join Date: Mar 2019
Location: Horley UK
Posts: 85
Default Re: 3 displays on Mac Pro 6,1 D300

Well shockingly I've got it working. In case anyone's interested, the problem is that although thunderbolt and mini-dp share the same connector, the power that thunderbolt provides isn't available over mini-dp, and there isn't enough juice to drive more than two DVI or HDMI displays.

I've been trying to find an Apple dual-link adapter without success (Apple don't sell them any more and there are very few on eBay etc.) and then I remembered I have a Belkin Thunderbolt dock I'm not using any more. It occurred to me that the thunderbolt "through port" on the Belkin might provide its own power.

And it does. Connecting the HDMI display using a mini-dp adapter but via the Belkin dock, it all works. Obviously this would be anything but a cheap solution if I didn't already have dock sitting around doing nothing.
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Justin

Mix room: Apple Mac Pro 6,1 late 2013 2.7Ghz 12-Core XeonE5, 64GB RAM, D300 Graphics, OSX Mojave 10.14.5/Pro Tools Ultimate 2019.6/Presonus Quantum 4848 Thunderbolt 2/Digidesign Command|8/Allen & Heath ZED-436 for fun

Studio: Apple Mac Pro 5,1 mid 2012 2x 3.46Ghz 6-Core Xeon, 64GB RAM, GeForce GTX 970 graphics, OSX Sierra 10.12.6/Pro Tools Ultimate 2018.12/HDX1/Avid HD 16x16, Digidesign 192 16x16, Digidesign 192 16x8/Custom Raindirk Symphony 32ch. front end
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