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Discuss how to disable dynamic power step iMac G5 at the Genuine Mac Support - Hackint0sh.org; how can I do that under an iMac G5, Mac OS X 10.4.11?...
  1. #1
    seseberg
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    Default how to disable dynamic power step iMac G5

    how can I do that under an iMac G5, Mac OS X 10.4.11?



  2. #2
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    Doesn't look like you can, or supposed to, to touch it...

    Quote Originally Posted by apple
    Power Stepping
    To conserve power when operating on battery power, the iBook computer supports two methods of power stepping to slow down the processor clock. One method is an inherent feature of the PowerPC G3 chip, called Dynamic Power Stepping (DPS) and cannot be adjusted by the user. DPS is controlled automatically by the system, stepping up the processor speed for performance-intensive applications and stepping down the processor speed for energy-efficient applications.

    Under Mac OS X, users can manually step down the processor by adjusting the Energy Saving Settings, which are located under the Energy Saver panel of System Preferences. Users can select from preconfigured profiles including Automatic, Highest Performance, Longest Battery Life, DVD Playback, and Presentations, or customize their own energy settings. Highest Performance and Longest Battery Life profiles override the DPS feature. Highest Performance maintains the highest processor speed while Longest Battery Life caps the processor speed at 400MHz.
    iBook: System Software

    Source:
    What is dynamic power step? - Mac Forums



    Just out of curiosity, why would you like to disable it?
    iMac 20' Intel Core 2 duo 2.16GHz, 4GB DDR2-667 SDRAM, Mac OS X 10.5.1 "Leopard"
    Hackintosh Q6600 4GB DDR2-667 SDRAM, 9800GT, Mac OS X 10.5.6 "Leopard" (EFI-X)
    Macbook 13' Intel Core 2 duo 2.2GHz, 4GB DDR2-667 SDRAM, Mac OS X 10.5.6 "Leopard"
    iPhone 2G (8GB) 2.2 (1.1.2 OTB) Week 48 J'B'ken + Activated + Unlocked

  3. #3
    seseberg
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    I thought that that was causing my iMac to go ape crazy with fans nearly hovering........
    the ram was the problem...............
    who knows, maybe Apple wrote a string in the OpenFirmware that acsually makes these things go crazy when other ram is put inside..........

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    Quote Originally Posted by seseberg View Post
    I thought that that was causing my iMac to go ape crazy with fans nearly hovering........
    the ram was the problem...............
    who knows, maybe Apple wrote a string in the OpenFirmware that acsually makes these things go crazy when other ram is put inside..........
    Try the SMC.
    iMac 20' Intel Core 2 duo 2.16GHz, 4GB DDR2-667 SDRAM, Mac OS X 10.5.1 "Leopard"
    Hackintosh Q6600 4GB DDR2-667 SDRAM, 9800GT, Mac OS X 10.5.6 "Leopard" (EFI-X)
    Macbook 13' Intel Core 2 duo 2.2GHz, 4GB DDR2-667 SDRAM, Mac OS X 10.5.6 "Leopard"
    iPhone 2G (8GB) 2.2 (1.1.2 OTB) Week 48 J'B'ken + Activated + Unlocked

 

 

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