Underclock a proccesor

Discussion in 'Hardware' started by Crito, Aug 3, 2008.

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  1. Kyle Porter

    Kyle Porter Veteran Moderator Senior Member

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    I know this may sound weird but how do you under clock a processor. I have a 1.2ghz c2d processor but i only use about 700mhz max under power saver mode. I want to know how to under clock it to about 900mhz to save power in power saver mode.
     
  2. dmlerner

    dmlerner Scribbler - Standard Member

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    at least in vista, you can create a custom power mode which lets you set th emin and max processor speeds. if you want 900, just set that to min and max i guess, but i'd say leave min a 0 make max 900
     
  3. Crito

    Crito Scribbler - Standard Member

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    The usual way is to change the FSB (front side bus) speed and/or clock multiplier in your BIOS. Most memory modules support one speed lower, say, from 400MHz (PC2-6400 aka DDR2-800) to 333 MHz FSB (PC2-5300 aka DDR2-667). Only some CPUs let you change the multiplier though (i.e. "Black Edition" from AMD). Unfortunately many OEMs also disable or lock BIOS settings so your options may be limited -- that's my main beef with HP, by the way... they like to cripple the BIOS so you can't futz with the machine too much. :|

    EDIT: For example, here's the mem in my tx2500z.
    [​IMG]
     
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