Early vs late 2015 iMac 27'' 5k side by side benchmark

Discussion in 'iMac' started by sammcj, Oct 25, 2015.

  1. sammcj macrumors member


    May 10, 2009
    Here's a the benchmark results of my early and late 2015 iMac 27'' 5k's if anyone is interested.

    Both have the built to order 4Ghz i7, 32GB RAM, 512GB SSD and the top graphics card (M295x,M395x) respectively.

    Note that on my late 2015 iMac, I'm using slightly faster / lower latency CAS 10 memory: http://www.crucial.com/usa/en/bls2k8g3n18aes4

    The late 2015 iMac's screen has noticeably more vivid colours - almost too vivid late at night, bright florescent colours can be overwhelming in a dark room.

    The M395X is 'acceptable' and allows you to play any game but certainly not past medium settings on modern games, for example Elite Dangerous needs to run at 2880x with most settings on medium / medium high at most.

    The NVMe SSD is the biggest advancement IMO, it's very noticeably faster and leaves my early 2015 iMac feeling sluggish on IO intensive tasks.

    For the detail comparison see: http://browser.primatelabs.com/geekbench3/compare/3958302?baseline=3958474

    Early vs Late 2015 iMac 5K Top CPU, Graphics, RAM.png
  2. maflynn Moderator


    Staff Member

    May 3, 2009
    I can't say that I'm surprised, though I think the faster numbers are great to see. I'm not sure what the advantages of the Skylake processor is for desktops. Wasn't one of its main purposes to improve power consumption? If so that's only really going to benefit portable computers.
  3. colodane macrumors 6502a


    Nov 11, 2012
    It will benefit the iMac also. Quieter operation (lower fan speed) under heavy use scenarios and/or better overall reliability due to lower average operating temperatures.

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