750M + Iris Pro combo thoughts

Discussion in 'MacBook Pro' started by Freyqq, Oct 22, 2013.

  1. Freyqq macrumors 68040

    Dec 13, 2004
    I think you can expect some major improvements in GPU speed with this combo, even though the 650M is similar to the 750M. The Iris Pro CPU included is 45 watts, just like before. However, more of the die area is reserved for graphics than before. So, I'd estimate that it is actually 30-35 watts with the CPU going on full and the iGPU at idle. That gives a lot of extra headroom for overclocking the 750M. I'm expecting some pretty impressive benchmark numbers when people get them.
  2. alphaod macrumors Core


    Feb 9, 2008
    I'm going to guess Apple already overlocked the GT 750M to be closer to the GTX 760M like before.

    So it'll be very fast.
  3. HurryKayne macrumors 6502a

    Jun 9, 2010
    Except for the price,the 15 retina 750m is the Notebook i was waiting since so long.
    Time to feed my wallet:cool:
  4. moep macrumors member

    Jun 9, 2004
    I don’t think this is correct, because I’d expect the CPU to simply use the additional available thermal envelope to clock the cores higher via Turbo Boost. That’s the whole point of turbo boost after all.
  5. watchthisspace macrumors 6502a

    Apr 11, 2010
    It could go in the totally opposite direction with Intels iris GPU being enough for Apple to not worry about overclocking the 750m
  6. ElderBrE macrumors regular


    Apr 14, 2004
    Then it would be slower than the previous generation and internet murders would happen.
  7. Quu macrumors 68020


    Apr 2, 2007
    OpenCL applications will be able to use both the Integrated and Dedicated GPU's simultaneously so I'd expect to see some huge gains in OpenCL performance.

    For gaming it still stands to be seen what they've done but I'm really excited to get mine.
  8. nill1234 macrumors member

    Dec 22, 2012
    The 750M is already an overclocked 650M so there is not much left to overclock
  9. Ifti macrumors 68000

    Dec 14, 2010
    So the 750m has 2GB of VRAM?
    How much VRAM does the Iris Pro have/use?
  10. nill1234 macrumors member

    Dec 22, 2012
    128MB EDRAM and it takes (if needed) from your ram
  11. leman macrumors G3

    Oct 14, 2008
    The eDRAM is the cache, its shared between iGPU and CPU.
  12. Aylan macrumors regular


    Jun 3, 2013
    Apple has an established history of getting better binned cores and also to overclock them. I'm fairly certain that the 750M is not a stock part. Also, this comes with 2GB of GDDR5 RAM, huge gain over stock 750M.

    Haswell is much better at power management and it will allocate resources where it is needed so I still expect great performance from the iGPU.

    This is a great combo and I'm glad Apple went this way. I believe the performance numbers will back this up since the battery gains were quite modest considering the CPU is on par with last year as well as 750M. The power has to be going somewhere.

    Can't wait to read up on the benchmarks and reviews of these machines.
  13. nill1234 macrumors member

    Dec 22, 2012
    I expect a minor performance increase. But we will see :). When can we expect the first benchmarks and reviews?
  14. dusk007 macrumors 68040


    Dec 5, 2009
    The Iris Pro has as much VRAM as the driver hands it. In Windows that is a variable up to 1536MB on all Intel GPUs. Apperantly OSX Mavericks will allow for a variable amount now too, rather than the fixed value it used to be.

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