No worries there, I already have a mini 6-6 pin and a mini 6 to 8 pin cable. I'm using it with the GTX580 now.dont mix up a GTX580 and a RX580
think sapphire is one of the brands most liked by osx?
RX 580 info, you will need two mac 6 pin to 6 pin (or 8 pin) cable to plug in to the card
https://forums.macrumors.com/thread...x580-pulse-into-the-mac-edition-card.2101909/
I'm on the lookout on ebay for the RX580 but no good deals yet.... I guess I just have to be patient.
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Increase your RAM as much as you can.
Would you suggest Non-ECC? It's got 16GB of ECC in there now.
You will also need fast RAID storage
I'm setting up a RAID 0 of two 120GB SSD's. Would that be enough?
I bought the Sonnet Tempo Sata III card and mounted two Samsung 850 Evo's.
I just got it installed in the machine and was up till past midnight flashing the firmware and getting High Sierra installed.
I went to sleep before the install finished so I'll have to check and see if everything is functioning today.
OS and Apps will be on a M.2 card.