Review of the Radeon Pro 450 vs 460?

Discussion in 'MacBook Pro' started by Westbrook0, Oct 31, 2016.

  1. Westbrook0 macrumors member

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    Oct 17, 2016
    #1
    When do you guys expect to see the review? I'm waiting on this to select my model.
     
  2. fs454 macrumors 68000

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    Los Angeles / Boston
    #2
    Probably 1-2 weeks when the notebooks begin to arrive. I don't believe anyone has review models of the 15" currently - at least Gruber and the common suspects do not.

    It's $100 to upgrade right? The GPUs are sort of weak to begin with. It's a worthy upgrade for sure.
     
  3. Trahearne, Oct 31, 2016
    Last edited: Oct 31, 2016

    Trahearne macrumors 6502

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    Oct 6, 2014
    #3
    You can have an idea of how these perform by looking at existing models:

    Pro 450 ~= M370X (1st gen GCN)
    Same in compute, Pro 450 has 10 GB/s more in memory bandwidth
    http://www.notebookcheck.net/AMD-Radeon-R9-M370X.142763.0.html

    Pro 460 ~= M385X (2nd gen GCN)
    Close in compute, Pro 460 has 16 GB/s less in memory bandwidth
    http://www.notebookcheck.net/AMD-Radeon-R9-M385X.154229.0.html

    The new GPUs use 4th gen GCN though. The major bullet points of 4th gen over 1st/2nd gen are:

    1. they handle geometries better than M370X/M385X, especially the Pro 450 over M370X.
    2. they have 2nd gen delta color compression, so they can do more with less memory bandwidth.
     
  4. dk808 macrumors 6502a

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    #4
    Will the new gpus run cooler/quieter?
     
  5. koyoot macrumors 601

    koyoot

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    Jun 5, 2012
    #5
    Radeon Pro 460 is closer to M390 than M385X
    The GPUs can run quieter in desktop environment. Only the fans of the MBP can not handle the thermal output of the GPUs. However 35W TDP is well within the power envelope for the laptop.
     
  6. Trahearne, Oct 31, 2016
    Last edited: Oct 31, 2016

    Trahearne macrumors 6502

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    #6
    M385X is definitely closer. M390 runs at 1.96 TFlops peak and has twice the memory bandwidth over Pro 460, mate.
    --- Post Merged, Oct 31, 2016 ---
    Apparently yes. AMD claims all of them running below 35W, and these are all made on 14nm that improves performance per watt significantly over 28nm we had been on for 4 years. Whether it is "quieter" depends on the cooling design though. But if everything is assumed to be unchanged, you can expect Pro 460 blowing fans like M370X, but doing better.
     
  7. inhalexhale1 macrumors 6502a

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    Ridgewood, NJ
    #7
    I know it's fluid until we actually get these cards benchmarked, but I am not liking the steady decline down their benchmark list that has happened since the announcement for the 450/455/460.

    On that note, shouldn't a "Pro" 460 be a better card than the standard 460m? Not looking that way though...
     
  8. koyoot macrumors 601

    koyoot

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    Jun 5, 2012
    #8
    It doesn't matter, that much, also Polaris architecture has that specific Delta Color Compression technology, which helps to save bandwidth, which Pitcairn, on which M390 is based does not have.

    1024 GCN cores@910 MHz, is closer to 1024 GCN cores@958 MHz, than 896@1100 MHz.
     
  9. Trahearne macrumors 6502

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    Oct 6, 2014
    #9
    Radeon Pro is AMD's new workstation graphics brand.
     
  10. inhalexhale1 macrumors 6502a

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    #10
    I understand that, but it appears the card is less powerful than a normal 460m. "Pro" and "workstation" means gimped versions? I would think they'd squeeze more power out of it for people who need it.
     
  11. Trahearne, Oct 31, 2016
    Last edited: Oct 31, 2016

    Trahearne macrumors 6502

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    #11
    DCC saves bandwidth only in a few specific circumstance (frame buffers, mainly), and is certainly not enough to pull the >2x gap with its proclaimed 35% gain in efficiency.

    --- Post Merged, Oct 31, 2016 ---
    But then you have to consider the RX 460 Notebook announced is just fitting the 75W desktop RX 460 in notebooks with an unknown power cap (but presumably lower). Here we have SKUs that specifically target a 35W cap, and the 460 is a fully unlocked chip with two extra CUs run at a lower clock frequency.
     
  12. inhalexhale1 macrumors 6502a

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    #12
    Right, I do see its 35W compared with 75W. (Pro 460 and 460m). I'll be very interested to see how they compare. If it's nearly identical, that would be very impressive considering the power difference.
     
  13. Trahearne macrumors 6502

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    Oct 6, 2014
    #13
    I would expect the 460 Mobile to be something at 55-65W, a special lower-power bin for notebooks. Given the known spec, it should be above Pro 460 too.
    --- Post Merged, Oct 31, 2016 ---
    By the way, workstation graphics differs not in spec, but in the graphics driver stack and the support. The software alone makes the card way worse in performance per dollar, if you consider these cards just for gaming purpose.

    Whether or not Apple ships the Pro graphics driver in Bootcamp is unknown though.
     
  14. cullenl87 macrumors member

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    Aug 24, 2012
    #14
    Notebook check says the 460m is basically an older 965m.
     

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