Need views on TitanZ, 980Ti and R9 295x2

Discussion in 'Mac Pro' started by rueyloon, Dec 20, 2016.

  1. rueyloon macrumors regular

    Joined:
    Sep 24, 2013
    #1
    Hello

    The long render time during these few days of work is making me go bonkers as I explore how can I upgrade my computer.

    I'm thinking of these 3 cards (unflashed) on an Akitio thunderbox. What do you think?

    This may also opens up a possible route to go back to my OMP instead....
    --- Post Merged, Dec 20, 2016 ---
    answering my own question, since I use FCPX and it uses OPEN CL, seems like the best card we have today is the 980ti

    https://browser.primatelabs.com/opencl-benchmarks
     
  2. Flint Ironstag macrumors 6502a

    Flint Ironstag

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    Houston, TX USA
    #2
    I'll add that the TitanZ and R9 295 x2 will only be seen and utilized as single GPU solutions in macOS.
     
  3. 666sheep macrumors 68040

    666sheep

    Joined:
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    Location:
    Poland
    #3
    Nope, each of these would be seen by the OS as 2 separate GPUs. And would be useable as two in software based on OpenCL and CUDA acceleration. Of course if R9 295x2 would work in OS X (macOS) at all ;) Titan Z will.
    Both listed cards are power hogs and will need modding the PSU or using external one (if you'd want to put them in cMP).
     
  4. Flint Ironstag macrumors 6502a

    Flint Ironstag

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    #4
  5. 666sheep macrumors 68040

    666sheep

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    #5
    That's BS. Only true thing in that thread is that 7990 doesn't work in OS X at all.
    Look, I wouldn't claim something that I didn't try.
    And many other people as well.
    You're reading wrong threads. Check Tutor's threads for example here or on otoy forum.
     
  6. Flint Ironstag, Dec 21, 2016
    Last edited: Dec 21, 2016

    Flint Ironstag macrumors 6502a

    Flint Ironstag

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    #6
    I'm making my way through an epic 70 page thread of his on OTOY right now for different reasons (best practices for building multiple GPU setup (I believe it's called)). Haven't seen any mention of those type of cards being used in OS X.

    [edit] Found this Tutor link from 2014. #1161 Seems the last dual GPU card OS X recognized is a GTX 590. If anyone's running newer hardware I'd love to hear about it (seriously).
     
  7. 666sheep macrumors 68040

    666sheep

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    Poland
    #7
    You can skip the beginning to about the 10:20


    ...and so on.
     
  8. Flint Ironstag macrumors 6502a

    Flint Ironstag

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    Houston, TX USA
    #8
    Holy cow - thanks for the link! Too bad (like everything else eGPU) it requires tinkering to work, and could break with any update. Antithetical to the Apple MO of "it just works".

    Hmmm... wonder how cheap Titan Zs are going for these days...

    Anyway - OP, take my initial post with a grain of salt. Looks like you just need to be extremely careful which dual GPU card you get, and be prepared to do some ongoing tinkering / maintenance.
     
  9. Daniel Reed, Dec 21, 2016
    Last edited: Dec 21, 2016

    Daniel Reed macrumors 6502

    Daniel Reed

    Joined:
    Sep 9, 2016
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    #9
    Maxwell 12GB GTX Titan-X is the best NVidia card supported for macOS.

    If using a nMP, D700s outform it in OpenCL by about 40%

    If you're stuck on D500s, the best option for performance on Mac is to sell the nMP and buy another one w/ D700s.

    Or buy two titans + two eGPU enclosures; but the egpu route will cost at least $2k (and upwards of $4k)

    Used nMPs w/ D500 are selling used at near full value new prices on eBay.

    It may be cheaper to sell your nMP and buy another nMP w/ D700s. A side benefit is the last builds of the nMP offer 50% faster read/read speeds for the 1TB option.

    OR just wait for the new Macs early next year if only doing 4K editing & mild CC/grading.
    --- Post Merged, Dec 21, 2016 ---
    A colleague tried a Titan-Z, but traded it out for a Titan-X

    The impression I got was beyond being overly finicky, the pcie 4x bus on TB was not enough for the two-cards-in-one Titan-Z

    I only have direct experience w/ the Titan-X over eGPU. While its amazing for iMacs and MBPs(even over TB1), I ended up just sticking w/ dual D700s w/ the 12-core.
     

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