2013 iMac Power Consumption

Discussion in 'iMac' started by kansei, Oct 5, 2013.

  1. kansei macrumors member

    Joined:
    Oct 5, 2013
    #1
    So, seeing as the big difference moving to Haswell is improved battery life in laptops, I figured it made sense that we'd see reduced power consumption on our desktops as well. I found this thread on the 2012 model http://forums.macrumors.com/showthread.php?t=1525226. Apple quotes figures of idle screen off 20.5W / screen on 79.9W. One would expect they'd post 'optimal' figures, so it looks like the Haswells do in fact consume much less power.

    Feel free to contribute readings from your meter if you have them, along with relevant system specs.

    27" - i7 3.5GHz - 780M - 256GB SSD - 24GB RAM
    • idle (screen off): 16.0W
    • middle screen brightness, browsing macrumors: 48-50W
    • max during gpu benchmark (unigine heaven w/ tessellation): 139W
     
  2. iSayuSay macrumors 68030

    iSayuSay

    Joined:
    Feb 6, 2011
    #2
    What a considerable power reduction. Pretty sure 5 years from now you can get x86 CPU capability in an iPhone or iPad while conserving battery life. Kudos to Intel for reducing my power bills!
     
  3. jg321 macrumors 6502

    Joined:
    Aug 29, 2012
    Location:
    UK
    #3

    Wow, that's amazing! Incredible what they're doing with these things these days.
     
  4. bp1000 macrumors 65816

    Joined:
    Jul 7, 2011
    #4
    I tested power consumption of my Haswell iMac and posted the results a my thread the other day. All results at idle.

    I clocked 25watts 1 bar to 70w full bar brightness.

    Auto brightness put it just under half which measured 30 watts. Incredibly for a 27" iMac.
     
  5. pastrychef, Oct 5, 2013
    Last edited: Oct 5, 2013

    pastrychef macrumors 601

    pastrychef

    Joined:
    Sep 15, 2006
    Location:
    New York City, NY
    #5
    Wow. Those numbers are remarkable. I measured wattage of the video card using iStat Menu while running a benchmark and the video card alone was using over 175W. This is in a Mac Pro, by the way.

    Thanks for posting.
     
  6. ioannis2005gr macrumors 6502

    ioannis2005gr

    Joined:
    Aug 10, 2013
    Location:
    Europe
    #6
    This is a wild progress!!!
     
  7. fhopper macrumors member

    fhopper

    Joined:
    Sep 18, 2007
    Location:
    Wichita Ks.
    #7
    There are so many reasons this was a major upgrade rather than a minor one as some people have said. Power consumption is one big step forward. (Not to mention the attendant reduction in heat generation in the office. I have an LED TV and now computer in a room that used to get hot... now it does not.) Of course the networking potential in an era of intrahome streaming is another. I bet the new Apple TV will blaze with 802.11 ac
     

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