MP 1,1-5,1 Dual 1080s in 2010 mac Pro?

Discussion in 'Mac Pro' started by Adamtracksler, Jun 8, 2019.

  1. Adamtracksler macrumors newbie

    Adamtracksler

    Joined:
    Jun 8, 2019
    #1
    im looking at upgrading my Mac Pro 2010 to dual 1080s for rendering with redshift.

    I know power is an issue.

    Is anyone else running dual 1080s?

    I have seen several solutions ranging from hacking the PSU to external PCIe chassis. Im looking for an easy, affordable and stable solution. (Im assuming an egpu enclosure with usb c won’t work, but maybe it will....)

    Thanks in advance. Ad
     
  2. tsialex macrumors 601

    tsialex

    Joined:
    Jun 13, 2016
    Location:
    Brazil
    #2
    Use the search, there are several examples, some with Pixla's mod and some with external PSUs.

    Mac Pro 5,1 don't have eGPU support in any form. eGPU needs Thunderbolt, Mac Pro 5,1 don't support it.
     
  3. startergo, Jun 8, 2019
    Last edited: Jun 8, 2019

    startergo macrumors 6502a

    startergo

    Joined:
    Sep 20, 2018
    #3
    I opted for Dell DA-2 Power supply
    + cables:
    https://kareonkables.com/products/akitio-thunder-2-3-dell-da-2-to-62-6-pin-power-solution
    Select the one without the barrel jack. Ask the seller to leave one connector open/not connected to the wires and the cables free from crimps so you can pass through the cables through the holes next to the PCIE slots and crimp/assemble the connector on the other side.
    This power supply will give you 216W power (very close to 225W) so you can power 8+6 pin connectors.
    --- Post Merged, Jun 8, 2019 ---
    Remember:
    the normal house breakers are 15A so you may have to split the usage through 2 15A breakers if you need 300W +300W power for 2 cards.
    https://qph.fs.quoracdn.net/main-qimg-53bb28bdae90d657161dab67a726a883
     
  4. aclarubicin macrumors member

    Joined:
    May 27, 2018
    #4
    eGPU does work with the Titan Ridge, and the GPU in the enclosure is able to drive displays. Done it myself
     
  5. tsialex macrumors 601

    tsialex

    Joined:
    Jun 13, 2016
    Location:
    Brazil
    #5
    Please be reasonable, do you think that is a solution? Until a way to initialise the Titan Ridge card from macOS is devised, it's not working and it's not a solution for someone in need of a GPU for rendering.
     
  6. Adamtracksler thread starter macrumors newbie

    Adamtracksler

    Joined:
    Jun 8, 2019
    #6
    Would an external PCIe enclosure like a netstor na211a work as an easy way?
     
  7. tsialex macrumors 601

    tsialex

    Joined:
    Jun 13, 2016
    Location:
    Brazil
    #7
    PCIe chassis, yes. Netstor na211a, no, it's just 300W.
     
  8. Adamtracksler thread starter macrumors newbie

    Adamtracksler

    Joined:
    Jun 8, 2019
    #8
    Any recommendations for a cheap and cheerful PCIe chassis?
     
  9. Adamtracksler, Jun 8, 2019
    Last edited: Jun 8, 2019

    Adamtracksler thread starter macrumors newbie

    Adamtracksler

    Joined:
    Jun 8, 2019
    #10
    How about these? (I’m in the us)

    StarTech PCI Express to 4 Slot PCI Expansion System Model PEX2PCI4
     
  10. startergo macrumors 6502a

    startergo

    Joined:
    Sep 20, 2018
    #11
  11. Adamtracksler thread starter macrumors newbie

    Adamtracksler

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    Jun 8, 2019
    #12
    Does the one lane mean it would only support one card?
     
  12. startergo macrumors 6502a

    startergo

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    Sep 20, 2018
    #13
  13. Adamtracksler thread starter macrumors newbie

    Adamtracksler

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    Jun 8, 2019
    #14
    So for a dummy like me: it would work, just slower?
     
  14. startergo macrumors 6502a

    startergo

    Joined:
    Sep 20, 2018
    #15
    I am not sure it will work for your application but for Bitcoin mining should work.
     
  15. Adamtracksler thread starter macrumors newbie

    Adamtracksler

    Joined:
    Jun 8, 2019
    #16
    Maybe I’m just better off getting a 1080ti until I can braven up enough for the Pixlas mod.
     
  16. velocityg4 macrumors 601

    velocityg4

    Joined:
    Dec 19, 2004
    Location:
    Georgia
    #17
    I'd think you could just use multiple PSU adapter like they do in mining.
    https://www.amazon.com/Multiple-Adapter-Connector-Genetek-Electric/dp/B0711WX9MC/

    Use an SATA to Molex adapter to run power to the adapter. Connect the 24Pin ATX connector from the secondary PSU to this. Then run PCIe power cables from your secondary PSU to your GTX 1080's. It won't look pretty and you'll have to leave the door off but it should work.

    The multiple PSU adapter simply tells the secondary PSU to turn on when you turn on your computer. I don't know if there is any reason this wouldn't work. It's done quite frequently with Cryptomining.

    Assuming the Mac Pro uses a standard ATX connector. Here is another option which is popular with miners.
    https://www.amazon.com/Optimal-Shop-Second-Motherboard-Adapter/dp/B07543LNRH/
     
  17. startergo macrumors 6502a

    startergo

    Joined:
    Sep 20, 2018
    #18
    When did you see Apple using any "standard" PC connector? It would be a good solution but will it work with sata to molex triggering PSU start?
     
  18. velocityg4 macrumors 601

    velocityg4

    Joined:
    Dec 19, 2004
    Location:
    Georgia
    #19
    It should. SATA gets power immediately. The SATA to Molex adapter doesn't do anything special. It just changes the physical connector. There isn't any sort of electrical conversion.
     
  19. Flint Ironstag macrumors 6502a

    Flint Ironstag

    Joined:
    Dec 1, 2013
    Location:
    Houston, TX USA
    #20
    Heads up - I don't know if Netstor has upgraded those chassis, but up to a couple of years back, the cooling solution was absolutely inadequate for 4 hard working GPUs.
     
  20. OS6-OSX macrumors 6502a

    OS6-OSX

    Joined:
    Jun 13, 2004
    Location:
    California
    #21
    Maybe not even for 1.
    I have my 980ti in a Netstor with an additional fan something like this one.

    So in that small box I have
    1. The Netstor fan
    2. 980ti fan
    3. A fan something like this on the side where the Netstor PCIE is slotted. Blows directly onto the 980ti

    4763849.01.prod.jpg
     
  21. ModernGnome macrumors newbie

    ModernGnome

    Joined:
    Nov 11, 2018
    #22
  22. macguru9999 macrumors regular

    Joined:
    Aug 9, 2006
    #23
    It would depend on the peak power supply draw, not just the cards installed. A mac pro PS is 980W so about 8 amps in the usa at 120v rms and 4 amps here in australia 240v rms.
     

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22 June 8, 2019