MBA Watt Usage

Discussion in 'MacBook Air' started by tech324, Jul 9, 2011.

  1. tech324 macrumors 6502

    Joined:
    Jul 25, 2010
    #1
    Has anyone ever hooked up their 11 or 13 inch MBA to a kill-a-watt meter to see how much power it draws on idle and full CPU usage? If someone could post their usage for idle and full CPU usage I would appreciate it.
     
  2. 42streetsdown macrumors 6502a

    42streetsdown

    Joined:
    Feb 12, 2011
    Location:
    Gallifrey, 5124
    #2
    1.21 gigawatts

    This would be interesting to know.
     
  3. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #3
    You can use iStat Menus (trial) to monitor your power use.
    [​IMG]
     
  4. Bottomsup macrumors regular

    Joined:
    May 10, 2011
    #4
    Yes I have.

    I have an 11" ultimate. Fully charged with normal usage i noticed it taking ~25 watts to operate. I was doing office productivity work so i didn't test full CPU load vs completely idle, etc..

    Charting is starts slow, ramps to ~35w, then back down as it reaches full capacity.

    hope this helps
     
  5. em500 macrumors regular

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    Apr 29, 2005
    #5
  6. tech324 thread starter macrumors 6502

    Joined:
    Jul 25, 2010
    #6
    Thanks for the numbers. Wow that seems kind of high. I wasn't expecting the 11 inch to run use up to 35 watts. I wonder if the new MBAs will use less.
     
  7. alust2013 macrumors 601

    alust2013

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    Feb 6, 2010
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    #7
    It should probably be similar. The 35W is because it will actually exceed the TDP at higher loads, the TDP is just kind of an average of sorts.
     
  8. Bottomsup macrumors regular

    Joined:
    May 10, 2011
    #8
    I should mention that the 35w was measured while the machine was shutdown and charging from an empty battery. It never uses near that much will powered up.
     
  9. alust2013 macrumors 601

    alust2013

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    Location:
    On the fence
    #9
    Ah, gotcha. That makes more sense, charging will do that.
     

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