MP All Models Multiple GPU's in Mojave

Discussion in 'Mac Pro' started by startergo, Jun 11, 2019 at 12:24 PM.

  1. startergo macrumors 6502a


    Sep 20, 2018
    Somebody said Mojave does not like multiple GPU's
    With the expansion chassis I have GT-640, GTX-Titan, RX-580 and I booted with the GT-640, and the RX-580 on 2 displays.
    --- Post Merged, Jun 11, 2019 at 12:29 PM ---
    Image correction

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  2. Flint Ironstag macrumors 6502a

    Flint Ironstag

    Dec 1, 2013
    Houston, TX USA
    Nice. Anyone know if the 4GPU limit has been lifted?
  3. startergo thread starter macrumors 6502a


    Sep 20, 2018
    No post with 4 cards. But I have problems with 3 cards in Windows 7 legacy mode, Windows 10 UEFI and HS. HS logs me out, then I log in and it logs me out again. I expected most problems with Mojave, but it actually performs the best.
  4. F.A.D. macrumors member


    Nov 14, 2009
    What Chassis are you are using?

    I always wanted to have something like the cubix expander and am curios if four Radeon VII in a cubix expander on a 5.1 deliver a performance close to the 7.1 with two MPX Modules.

    On High Sierra FCPX seems to use 4 GPU's, I remember reading an article where they used 4x7950's and got render times that took approx. 1/4 of the time.

    I wonder if these kind of boards would work for a 5.1:

    Best regards,

  5. startergo, Jun 12, 2019 at 3:31 AM
    Last edited: Jun 12, 2019 at 6:32 AM

    startergo thread starter macrumors 6502a


    Sep 20, 2018
    That is the exact same board I use plus Rosewill 1600W PSU
    or you can get this:
    reasonable price for this setup
    I could not make the GTX Titan, RX 580 and 2 GT 640 (4 total cards) to boot at all. Perhaps if I put all the cards in the expansion box it may work or maybe 4 identical cards work.
    --- Post Merged, Jun 12, 2019 at 3:46 AM ---
    I don't think real world GPU performance is much different in Gen2 PCIEx16 vs PCIE Gen3
  6. Ludacrisvp macrumors regular

    May 14, 2008

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