2016 iMac Polaris Video Card info

Discussion in 'iMac' started by Trebuin, Sep 2, 2016.

  1. Trebuin, Sep 2, 2016
    Last edited: Oct 18, 2016

    Trebuin macrumors 65816

    Trebuin

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    #1
    There's a lot of threads that have a wish list or a guess at what AMD card the new iMacs will get, the best guess being a AMD 460 which does not perform nearly as well as nVidia for good reasons. For that matter, the 395x might be the better option. But this is all cause by speculation. Here's what I have found:

    Starting with this article by our own:
    http://www.macrumors.com/2016/04/19/amd-polaris-2016-macs/
    According to this, the Polaris 11 has a power range designed for notebooks. The Polaris 10 is designed for the iMac or greater. So what is the difference between the 10 and 11?

    http://www.notebookcheck.net/uploads/tx_nbc2/AMD_Polaris_10_and_Polaris_11.jpg
    This gives us only TFLOPS to compare by...not a very good indicator, but enough to give us a good starting point. The iMac should be on order of at least 5 TFLOPS.

    Finally: http://www.pcadvisor.co.uk/feature/...rce-gtx-1080-vs-gtx-1070-vs-gtx-1060-3640925/
    This indicates we are looking somewhere between the 1060 and 1070 in performance. The RX 470 is first to meet the specs...it is a polaris 10. As nothing has been mentioned with a RX 490, I wouldn't hold my breath on that and would expect to see a performance between the nVidia 1060 and 1070.

    http://wccftech.com/amd-radeon-rx-480-polaris-10-graphics-card-leak/
    http://wccftech.com/amd-rx-470-460-specs-performance-launch-dates/

    The best of the benchmarks I can currently find:
    http://www.notebookcheck.net/Mobile-Graphics-Cards-Benchmark-List.844.0.html
    From the 395x, we should still see a considerable performance boost looking at the 1060...I just don't know how much over the 1060. Feel free to chime in thoughts.

    Update:
    AMD Has designated the 490 as built on Vega and won't come any sooner than this spring. That leaves us with the 470-480 and one X build which will either be 480x or 485x, if AMD designates any 485.

    Regardless, we should see a performance increase on each model and a possibility of a power/temperature drop.
     
  2. Floris macrumors 68020

    Floris

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  3. Trebuin thread starter macrumors 65816

    Trebuin

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    #3
    I just hope that the release is in October and we see the 90-95x
     
  4. Brookzy macrumors 601

    Brookzy

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    #4
    But where are the new CPUs? Everyone keeps talking about an October update but it's not going to happen without some change on the CPU front, surely.
     
  5. AsprineTm macrumors member

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    #5
  6. Crosscreek macrumors 68030

    Crosscreek

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    #6
    The RX 480 and Nvidia 1060 are equal performers with a slight advantage to RX 480 in some games optimized for Direct X 12 or Vulcan such as Doom.

    Custom overclocked 1060 cards will out perform RX 480.
     
  7. Srb001 Suspended

    Joined:
    Sep 2, 2016
    #7
    if they do a redesign of the imac, they dont need new cpu. even so, to have latest ports usb-c/tb3 to have latest ddr4 ram, to have latest ssd, to have the latest dGPU it can be upgraded even if they take them 5 min on the stage
    --- Post Merged, Sep 4, 2016 ---
    i dont think RX 480 with 150W could fit into the imac,so the only solution is RX 470
     
  8. Crosscreek macrumors 68030

    Crosscreek

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    #8
    There is support for the RX 470 cards in Sierra and a person in the Pro forum has one running. The RX 480 seems unstable and a few people have the RX 460 running OOB on hacks and Mac Pro.
     
  9. Trebuin thread starter macrumors 65816

    Trebuin

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    #9
    Keep in mind that they may use a lower power variant. The 395x is a high end ATI card, but is powered down. The Polaris was designed to reduce both power and heat but still allow an increase on the clocks. That being said, we may see the 470 or we might see an underpowered 480 or 490 to keep within power parameters. We likely won't know until Oct.
    --- Post Merged, Sep 4, 2016 ---
    I'm interested in seeing how the 470 compares to the 395x.
     
  10. AlexGraphicD macrumors regular

    AlexGraphicD

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    Oct 26, 2015
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    New York
    #10
    Are the new Polaris cards gonna make a great difference from the current m390 m395 and m395X models?

    I'm thinking of waiting for the new updated iMacs in October but would like to save some money on a refurb 2015 iMac but don't know if it's worth it.
     
  11. Trebuin thread starter macrumors 65816

    Trebuin

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    #11
    In theory, double GPU performance. In reality, it has to deal with watt and temp limits which drives a down clock. The die shrink gives them double to 2.5x the performance per watt so the the 470 running at the watts it is is not comperable to the previous cards. http://www.extremetech.com/gaming/2...s-2-5x-performance-per-watt-may-utilize-gddr5

    I'm looking up temp info now. That will be the looting driver for the next cards. Yes, we could in theory get up to 250% performance, but where do we hit thermal limits?
     
  12. AlexGraphicD macrumors regular

    AlexGraphicD

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    #12
    Wow 250% performance??!!
    That's a lot of difference from the current models.
     
  13. Trebuin thread starter macrumors 65816

    Trebuin

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    #13
    Only in a perfect world, original stats said about 2x performance, not 2.5x and I think the current benchmarks are showing a little bit lower than 2x. FinFet opened the door to a huge performance boost. Now you know why so many are obsessed over Polaris 10 and nvidias 1k series
     
  14. Crosscreek macrumors 68030

    Crosscreek

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    #14
    More on par with R9 390x.
     
  15. maflynn Moderator

    maflynn

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    #15
    Isn't that high for a laptop?
     
  16. Srb001 Suspended

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    Sep 2, 2016
    #16
    for a laptop ofc but for the imac its ok.The M295x and M395x are 120W cards
     
  17. maflynn Moderator

    maflynn

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    #17
    No question for a desktop its fine but I was shocked to see it in a laptop
     
  18. Srb001 Suspended

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    Sep 2, 2016
    #18
    i think it can fit in a big laptop like alienware...they are very thick and if im not mistaken they have 4 fans.Remember the upcoming Predator laptop has 2x Nvidia 1080
     
  19. Trebuin thread starter macrumors 65816

    Trebuin

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    #19
    So the Vega is going to take the 490 designator in the spring, meaning we may see 470-485x (max)
     
  20. cynics macrumors G4

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    Jan 8, 2012
    #20
    I would much prefer a spring release with Vega than a fall release of Polaris.
     
  21. theitsage macrumors 6502a

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    Aug 28, 2005
    #21
    I've been using several Polaris 10 GPUs in the past 3 months in my Mac Pro towers. At the very least, new high-end iMacs will have an RX 470. RX 480 has a very good chance as well. The driver kext in macOS for these GPUs also contains a PCI ID for a GPU that should have higher specs than the RX 480 - that could be for the new Mac Pro though.
     
  22. Crosscreek macrumors 68030

    Crosscreek

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    #22
    I have a 480 in my hack and the drivers seem a little lacking according to Geekbench GPU scores. Hope they can get them where they should be when the new Macs come out.
     

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