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Installing Pro Tools HDX card - not enough pcie aux power Audio Interfaces
Old 4th December 2016
Here for the gear

Installing Pro Tools HDX card - not enough pcie aux power

Hello, I've been struggling to find answers to these questions online, so any help would be greatly appreciated!

I recently purchased a mid 2012 mac pro 5.1 with 2X 3.46 GHz 6-Core Intel Xeon processors to run Pro Tools 12 and Pro Tools HDX card.

It came with a Geforce Titan X GPU, which uses 2 aux pcie power cables, leaving no available aux power for the HDX card.

My questions are:

1. is there any way to make this setup work, assuming I can't add thunderbolt, and therefore can not use an expansion chassis?

2. If I absolutely have to replace the Geforce Titan X in order to install the HDX Pcie card, what is the best gpu card I can buy that only uses 1 Pcie Aux power port?

Thank you in advance!
Old 4th December 2016
Lives for gear

You can first try to use some splitter for 6 pin power connector.
Kinda like this..
I can't tell you, if that will be sufficient for all your components though..
Titan is pretty power demanding card (can reach >250W) and single splitted line together with HDX card could be over the current limit for the power supply.
I've never tried it at Mac, it has to be some aftermarket upgrade at your setup.

Anyway, for a DAW usage you'd definitely don't need Titan X.
Among official graphic cards supported by Apple, I have pretty good experience with AMD Radeons 5770 or 5870.. both works well in all original MacPros (even with oldest models) and works without any additional driver.
If you want some more recent card, then you can likely use some newer Nvidia card like GeForce 750, which isn't supported at Mac OS X out of box, but can be used in similar fashion like your Titan with unified Nvidia downloadable driver.
Those upgrades belongs more to hackintosh territory, so check for more details about its compatiblity, required driver versions etc.

Old 4th December 2016
Gear Nut
My Mac Pro 5,1 running a HDX system, also came with a dual power supply required GPU (ATI 5870). Traded that down to a single power supply GPU.

Honestly, unless you're trying to multi purpose your Mac (I.e., using for more than strictly audio work) there's no need for a high end GPU and that's another conversation.

I've tried a NVIDIA GeForce GT120 (requires no motherboard power) and a ATI Radeon HD 5770 Graphics for Mac Pro (requires one motherboard power connection.). Arguably based on pure specs, the 5770 is a better GPU than the GT120, but in real world usage when running Pro Tools HDX, I didn't notice any improvement in graphics display using the 5770 over the GT120.

I have a dual display setup with an Apple 27" Cimena display and a smaller Dell VGA display. Running OSX 10.5.5.

I settled on the 5770 just because I could.
Old 5th December 2016
Here for the gear

Thanks a lot guys! I ended up buying a GTX750 Ti. Anyone want to buy a Titan X?
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