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How to install new Radeon GPU in Mac Pro 2009 with only 1 free 6-pin PCIe port?

Home Create Pro Forums Community Community Discussion How to install new Radeon GPU in Mac Pro 2009 with only 1 free 6-pin PCIe port?

3 months, 1 week ago
  • This topic has 1 reply, 2 voices, and was last updated No Replies by AvatarCharles.
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      Mac User


      New here. I am setting up Pro Tools HDX on a 2009 Mac Pro flashed to 5,1. The HDX card takes up one PCIe slot, and one of the mini 6 pin power ports on the motherboard. I have an AMD Radeon 7970 3GB (supposedly) pre-flashed for Mac, metal compatible, so I can upgrade to Mojave. Went to install the new GPU today and I find that the graphic card has two power cables, one 6 pin and one 8 pin, that each require a mini 6 pin PCIe port on the Mac. Is there a workaround? An adapter I can get? Mike Thornton describes this scenario on Pro Tools Expert, but no in enough detail so I know what he did.

      Any tips would be appreciated, and with as much detail as possible! Thanks in advance – Steve

    • Up
      Create Pro Staff



      Do you require the use of your optical drives? If not we have a custom cable that can be paired with a six pin to power your GPU leaving a six pin free for HDX.


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