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Quad Core MBP saving battery life by only using two cores

347 Views 9 Replies Latest reply: May 12, 2012 5:21 PM by Courcoul RSS
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May 12, 2012 12:09 PM

I am trying to use my MBP 8,2 with two of my four cores shut down in order to preserve battery life. Is this at all possible through 3rd party apps?

MacBook Pro, Mac OS X (10.7.4)
  • OGELTHORPE Level 7 Level 7 (22,605 points)

    If you utilize only part of your CPU, don't you think that it will take longer to process a given item of data and that there will be no effective savings of battery resources?  It may very well be that more energy will actually be required because real energy 'hogs' like the HDD will be needed for longer periods of time.  I have faith in Apple engineers who have designed the CPU to be as efficient as possible and I see no virtue in pursuing this avenue.  A SSD would be a better possible solution for extending battery life.

     

    I know of no applications that you are seeking.

     

    Ciao.

  • Grant Bennet-Alder Level 8 Level 8 (48,140 points)

    A SSD would be a better possible solution for extending battery life.

    It certainly is. I bought one for my son for better performance. He said it made a slight improvement, but that his Mac was so much cooler and not spinning the motor in the drive meant that his battery lasted MUCH longer that way.

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
  • wjosten Level 10 Level 10 (91,440 points)
  • Grant Bennet-Alder Level 8 Level 8 (48,140 points)

    The power management built into Mac OS X verges on amazing.

     

    Unix and Windows users sometimes complain because those others do nowhere near as good a job as what comes standard on your Mac.

     

    I am not sure you are going to see a dramatic improvement over what is already in place in your Mac running Mac OS X.

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
  • Courcoul Level 6 Level 6 (11,180 points)

    This whole thread reminds me of some of the nutty ideas American carmakers came up with during one of the first gasoline shocks back in the 70's. Don't remember whether it was Chrysler or GM, hellbent on keeping their huge gas guzzler engines, came up with the idea of disabling one or more cylinders when "not needed". A totally Rube Goldberg-ian contraption ensued, more prone to failure than any potential gas it may have saved.

     

    And while on topic and following Señor Grant's lead, last Wedneday decided to take my MBP to the edge. 8% battery charge remaining, that is. That took the whole of 7:15, while running at 50% backlight, WiFi, MS Word and two browsers going (all four cores, too). Then on Thursday 10.7.4 + Safari 5.1.7 came out. So, back to the drawing board on Friday. 7:20 and 6% remaining, got tired of waiting and all this mine is bigger than yours BS and plugged it back in...

    MacBook Pro (15-inch Late 2011), Mac OS X (10.7.4), 2.4GHz, 8GB, Widescreen/Anti-glare
  • Grant Bennet-Alder Level 8 Level 8 (48,140 points)

    disabling one or more cylinders when "not needed"

    Still available on several models, and not just American cars. The Honda Oddesy 2011 V6 has it, according to wikipedia.

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
  • Courcoul Level 6 Level 6 (11,180 points)

    Goes to prove that some things just refuse to die (see here: http://www.itworld.com/hardware/270936/living-computing-fossils-old-tech-holding -dear-life ). At least now the "selectable piston" engine is much more doable, given modern all-electronic engine management, including drive-by-wire.

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