CPU B using more power than CPU A?

Discussion in 'Mac Pro' started by macuserx86, Dec 9, 2009.

  1. macuserx86 macrumors 6502a

    macuserx86

    Joined:
    Jun 12, 2006
    #1
    Looking in iStat menus the other day, I noticed that CPU B was consistently using more power than CPU A (not more Volts, more amps and watts). Is this normal? is this bad?
    Thanks in advance for the help!
     

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  2. zachsilvey macrumors 6502

    Joined:
    Feb 5, 2008
    Location:
    Battle Ground
    #2
    The balance of processor usage between cores is never the same. If you are using an app that can only use a single processing core then it will increase the load on that cpu thus increasing the power draw on that core.
     
  3. gugucom macrumors 68020

    gugucom

    Joined:
    May 21, 2009
    Location:
    Munich, Germany
    #3
    On my 2009 MP the A CPU usually runs hotter and uses more power.
     
  4. macuserx86 thread starter macrumors 6502a

    macuserx86

    Joined:
    Jun 12, 2006
    #4
    So it would appear that this is normal then. I just got scared for a minute; I'm very protective of my 42 lb baby :D
     
  5. J the Ninja macrumors 68000

    Joined:
    Jul 14, 2008
    #5
    I've found it's best to not stare at the sensors display in iStat Menus too long. :) You start getting paranoid. (Although it does tell you interesting things about why battery life mysteriously goes away in Snow Leopard)
     
  6. zachsilvey macrumors 6502

    Joined:
    Feb 5, 2008
    Location:
    Battle Ground
    #6
    I get way to obsessed with the stats that iStat gives me, the problem is that I also set up the iPhone app so I can see stats wherever I am.
     
  7. macuserx86 thread starter macrumors 6502a

    macuserx86

    Joined:
    Jun 12, 2006
    #7
    Ya, that's true. I like to look at the processors one though; I'm still amazed that I have 8 physical cores in my computer. I went from a 12" PowerBook to a 2.8 GHz octo Mac Pro. That's like going from a Civic to a Zonda F roadster :D
     
  8. 300D macrumors 65816

    300D

    Joined:
    May 2, 2009
    Location:
    Tulsa
    #8
    The OS frequently switches the core an application hogs to balance thermal loading of the die.
     

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