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    Sager 5760 CPU Half Speed On Battery

    Discussion in 'Sager and Clevo' started by jmcmike, Apr 12, 2008.

  1. jmcmike

    jmcmike Notebook Enthusiast

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    Hello, I bought a Sager 5760 recently off ebay. Overall I am happy with it but I discovered something today that has me pretty disappointed.

    Today I have found that the CPU is cut off at 50% (1GHz in this case) whenever the laptop is on battery power. Note that this is not a minimum of 50% but a maximum of 50%. I can leave a game running in a window and watch my frame rate go down by about 45% when I unplug the AC. I am verifying this with CPU-Z.

    I also know that the GPU/Mem on my video card (Nvidia 7950 GTX) if fine because I have been able to get the latest beta of ATItool to run and it is showing my GPU/Mem speed holding steady on battery power.

    Things I have tried so far.

    1) Changed/modified vista power profiles in every reasonable way I can think of.
    2) Disabled portions of or all of the CPU power management in the BIOS. What I found is that disabling GV3 support will cut the CPU to half speed regardless of the power source. So it runs at 1GHz even on AC power with GV3 disabled.

    If I think of anything else I will post it here. I found one other thread on this forum related to a Sony laptop that exhibited similar behavior but there was no solution.

    Can anyone provide any insight please?

    Thanks.
     
    jmcmike, Apr 12, 2008
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  2. jmcmike

    jmcmike Notebook Enthusiast

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    I found a solution. First I got RMCLock to run under Vista x64 by following the instructions here:
    http://forum.notebookreview.com/showthread.php?t=220543

    The latest Vista patches don't let it fully load it's drivers (many options are still grayed out) but it runs well enough to set P-state transitions in the profiles. I set up the Maximal Performance profile to set the 12x multiplier P-state on AC and battery, set this profile to be the startup profile for RMClock and put a shortcut to the VBS script in my startup folder.

    I can now drop my AC power and see the clock dip briefly but return to 2GHz immediately.
     
    jmcmike, Apr 12, 2008
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