iMac 27" Retina 4GHz Late 2014?

Discussion in 'iMac' started by pasipple, Jul 7, 2015.

  1. pasipple macrumors 6502a

    pasipple

    Joined:
    Jun 12, 2009
    #1
    B&H is selling the following:

    Apple 27" iMac with Retina 5K Display (Late 2014)
      • 27" Retina 5K IPS Display
      • 5120 x 2880 Native Resolution
      • 4.0 GHz Intel Core i7 (Haswell)
      • 8GB of 1600 MHz DDR3 RAM
      • 512GB Solid State Drive
      • AMD Radeon M295X GPU (4GB GDDR5)
      • 802.11ac Wi-Fi, Bluetooth 4.0
      • 2x Thunderbolt 2 and 4x USB 3.0 Ports
      • FaceTime HD Camera, Dual Mics, Speakers
      • Mac OS X 10.10 Yosemite
    I thought the 4.0GHz and M295X GPU came out in mid 2015? Wondering what the difference is with ordering it directly from Apple? This model is $50 cheaper and no tax. Thanks...
     
  2. redheeler macrumors 603

    redheeler

    Joined:
    Oct 17, 2014
    #2
    No, that would be the low-end 3.3 GHz i5 and M290 GPU. The other configurations are from late 2014, which is when I got mine.
     
  3. pasipple thread starter macrumors 6502a

    pasipple

    Joined:
    Jun 12, 2009
    #3
    So what's the difference from this B&H Late 2014 to ordering off the Apple website and getting a Mid 2015. Seems like they're identical?
     
  4. redheeler macrumors 603

    redheeler

    Joined:
    Oct 17, 2014
    #4
    All of the M295X/i7 Retina iMacs are late 2014, including the ones on Apple's website. Only the lower-spec model is mid 2015, because it was added later.
     
  5. pasipple thread starter macrumors 6502a

    pasipple

    Joined:
    Jun 12, 2009
    #5
    Gotcha. Thank you very much.
     
  6. olemed macrumors member

    olemed

    Joined:
    Mar 27, 2007
    Location:
    Providence, RI
    #6
    Thanks for pointing this out. I was wondering about this but it wasn't clear on the Apple website.
     
  7. dyn macrumors 68030

    Joined:
    Aug 8, 2009
    Location:
    .nl
    #7
    That's because Apple never discusses it. Whatever you order from the site are their current models (except for the refurbished part of the store).
     
  8. jerwin macrumors 65816

    Joined:
    Jun 13, 2015
    #8
    If you really want to know the ins and outs of each model-- specwise, I'd suggest using this program

    MacTracker

    It's very useful if your household drafts you as "tech support guy"
     
  9. bladerunner2000 macrumors 68000

    bladerunner2000

    Joined:
    Jun 12, 2015
    #9
    The processor (4790k) doesn't actually run at 4ghz, it's downthrottled due to the incredibly poor airflow. Which explains why the iMac scores only 16,500 in Geekbench.

    Also, there's no way to overclock it as theres no BIOS control for it, Apple should have put in a standard 4790 CPU in there.
     
  10. yjchua95 macrumors 604

    Joined:
    Apr 23, 2011
    Location:
    GVA, KUL, MEL (current), ZQN
    #10
    You mean, it does actually run at 4GHz, just that it doesn't turbo all that well to 4.4GHz.

    Using Intel Power Gadget, I always see that the iMac can consistently maintain a base freq of 4GHz, but doesn't really turbo all that well.
     
  11. jerwin macrumors 65816

    Joined:
    Jun 13, 2015
    #11
    Here's a video showing the 4.0 GHz iMac throttling and turboboosting over time

    http://robservatory.com/intel-power-gadget/

    Throttles at 4 GhZ when all four cores are in use. Now, the classic turboboosting scheme would only enable the boost if a core was not in use, but apparently not. Wikipedia lists its as 2/2/3/4. 4.2 GHz when all four cores are in use? Must be the "sensibly cooled" configuration.
     
  12. dyn macrumors 68030

    Joined:
    Aug 8, 2009
    Location:
    .nl
    #12
    Current CPUs are meant to scale up and down with performance. They adjust to whatever the machine needs. Which is exactly what you are seeing on your machine since the listed temperature is not even near the max of the CPU.
     

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