Undervolting in OS X?

Discussion in 'MacBook Pro' started by powz, Jun 1, 2008.

  1. powz macrumors regular

    Joined:
    Apr 24, 2007
    #1
    My MBP is running too hot. Does anyone know a good way to undervolt Santa Rosa or later MBPs in OS X? I did a search and the only program that came up for undervolting in OS X is something called Coolbook, but it doesn't fully support SR MBPs. Thanks for any help!
     
  2. powz thread starter macrumors regular

    Joined:
    Apr 24, 2007
    #3
    ~80C+ but that's kind of irrelevant to the question...
     
  3. MSmith1915 macrumors newbie

    Joined:
    Mar 8, 2008
    #4
    Undervoltage

    Try this web site. I'm using it on my March MBP, 15in and it runs 5 to 6 degrees cooler at idle. When I task the CPU, it throttles up the CPU to meet the demand.

    http://www.coolbook.se/CoolBook.html

    Mike
     
  4. powz thread starter macrumors regular

    Joined:
    Apr 24, 2007
    #5
    Hi Mike, thanks for the reply. Unfortunately, Coolbook doesn't fully support my Santa Rosa MBP so I'm looking for an alternative. Anyone?

     
  5. bart rijksen macrumors regular

    Joined:
    Mar 1, 2008
    #6
    you could try raising the fan speed using smc fancontrol
     
  6. rezenclowd3 macrumors 6502a

    rezenclowd3

    Joined:
    Sep 28, 2004
    Location:
    Undoing the work of Priuses: burning gas & rubber
    #7
    I have not used Coolbook for the same reason as the OP. I do undervolt my SR MBP in Win XP SP2. In OS X I use SMC Fan Control and have the minimum set to 4k RPM which keeps internal temps close to 100ºF
     
  7. Kaupa macrumors regular

    Joined:
    Apr 16, 2008
    Location:
    Germany
    #8
    Somewhere i ve read about somesting called speedit. But you have to be able to work with the terminal and as I have no idea bout that i didnt try.
    But coolbook is compatible to the SR machines. The only reduction he gives is a slightly shorter battery life. And i can tell you that you wont realize it because thats only and issue for idle CPUs.
     
  8. powz thread starter macrumors regular

    Joined:
    Apr 24, 2007
    #9
    That's pretty good with 4k RPM. I use SMC Fan Control as well but even at 4k RPM and just doing IM and web surfing my temp is about 50C (~122 F) in OS X (Vista is significantly higher even with undervolting).

    Thanks. Battery life is important to me when using my MBP in class. That's why I'm looking for a better solution.
     
  9. bart rijksen macrumors regular

    Joined:
    Mar 1, 2008
    #10
    How does speedit work? i downloaded it, but it doesn't seem to do anything.
     

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