Coolbook -- no frequency options

Discussion in 'MacBook Air' started by tabakj, Jul 27, 2009.

  1. tabakj macrumors newbie

    Nov 8, 2008
    I just installed Coolbook (version 2.14, the latest download available from on my Rev. B Air (1.6GHz/120GB) and activated my license.

    When I open Coolbook, the only frequency option in the drop-down menu is 1596 MHz. I have read the Coolbook manual. I tried restarting my Air. I tried uninstalling and reinstalling and reactivating Coolbook. I cannot determine the problem.

    Any ideas? I cannot figure out how to get Coolbook to allow me to set frequencies other than 1596 MHz. The default Coolbook settings are 798 MHz @ .925V and 1596 MHZ @ 1.0V. I can change the voltage of the 1596 MHz setting, but I can't even modify the 798 MHz setting that the program preconfigured.

    Thanks in advance!
  2. guidoverduci macrumors member

    Oct 17, 2008
    anyone?.... I have the same problem with the same MBA.
  3. mehlah macrumors newbie

    Aug 12, 2009
  4. ayeying macrumors 601


    Dec 5, 2007
    Yay Area, CA
    Thats all you can change cause the CPU frequencies goes from:


    (Valid of Rev B/C)
  5. tabakj thread starter macrumors newbie

    Nov 8, 2008
    Interesting. But I am not able to change the voltage of the 798MHz option; I am only able to change the voltage of the 1598MHz option. Any ideas?
  6. ayeying macrumors 601


    Dec 5, 2007
    Yay Area, CA
    800MHz is already at the lowest so what voltage can you change to? The 800MHz is actually a SLFM (Super Low Frequency Mode)
  7. harrymcfly macrumors newbie

    Aug 6, 2009
    Is there any reason I would want to install Colbook in my MBA 2.13GHz, 128 SSD - Rev C? Yes, the computer heats up under stress but so has every other Mac laptop I've ever owned.

    Are Rev C owners using Coolbook? And, do people think that Snow Leopard will mitigate heat issues for MacBooks generally? Thanks!
  8. Jobsian macrumors 6502a


    Jul 30, 2009
    I'd like these questions answered too please!
  9. giacotit macrumors newbie

    Aug 8, 2009
    Hey Guys,

    my first post :rolleyes:

    I have recently bought my first Mac (MBA 1,86 GHZ, 128 GB SSD) and tried rigging Coolbook according to manuals and posts in macrumors.

    Three frequencies: 798, 1586 and 1862. No way to set intermediate frequencies.

    Voltage: 0,9250 minimum value.

    I could just undervoltage 1586 GHZ (0.9250) and 1862 (0,950).

    Apparently no substantial improvements :confused: but still testing...

    :apple: MBA Rev. B 1,86 GHZ, 128 SSD
  10. ayeying macrumors 601


    Dec 5, 2007
    Yay Area, CA
    The biggest improvement you'll see is the throttling. Coolbook's throttling is less aggressive compared to OSX's throttling. However, you can probably hit 0.9375 Volts, maybe even 0.9250 for 1.86GHz.
  11. h1d macrumors regular

    Nov 30, 2008
    Depends. But thankfully, rev C doesn't cause kernel_task screw ups without CoolBook at least.

    Read my 2nd reply here down below :

    In short, I still wanted it for myself. OS' default throttling isn't what I wanted.

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