Power supply question

Discussion in 'MacBook' started by adder7712, Dec 9, 2009.

  1. adder7712 macrumors 68000

    adder7712

    Joined:
    Mar 9, 2009
    Location:
    Canada
    #1
    Does the MacBook Aluminium lower the performance while running on battery only? I got 2914 on Geekbench while on battery power and 2918 with the AC plugged in.
     
  2. zachsilvey macrumors 6502

    Joined:
    Feb 5, 2008
    Location:
    Battle Ground
    #2
    Yes, the same thing happens when you pull out the battery and run it just on AC. At peak performance the chip draws power from both battery and ac at the same time.
     
  3. adder7712 thread starter macrumors 68000

    adder7712

    Joined:
    Mar 9, 2009
    Location:
    Canada
    #3
    I think that's why when I simply slide my mouse across the dock, it's slower when in Battery only mode.

    Does this apply?
     
  4. zachsilvey macrumors 6502

    Joined:
    Feb 5, 2008
    Location:
    Battle Ground
    #4
    It shouldn't make a huge difference in day to day things. It really only shows up in benchmarking and processor intensive apps like when working with video or photoshop.
     
  5. adder7712 thread starter macrumors 68000

    adder7712

    Joined:
    Mar 9, 2009
    Location:
    Canada
    #5
    I haven't noticed anything when playing COD4 without AC.

    I play that game without AC to drain the battery. :p
     
  6. zachsilvey macrumors 6502

    Joined:
    Feb 5, 2008
    Location:
    Battle Ground
    #6
    COD is much more GPU intensive than CPU intensive. I'm not entirely sure about the GPU is effected by power source.
     
  7. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #7
    It'll automatically scale to the level of performance required when on battery. 4 points out of 2918 just shows that it'll scale up to full performance when needed on battery.
     

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