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    Can not undervolt Celeron M?

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by jcy, Feb 23, 2006.

  1. jcy

    jcy Notebook Enthusiast

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    Ok, I got a new Celeron M 380 and read that undervolting can make your laptop cooler, so started looking around. Looks like you can not undervolt Celeron M's, is that true? I tried RMClock, NHC, Crystal CPU and none of them seem to work. Most have the voltage section grayed out. On Crystal CPU, it seemed to allow me to change the voltage on the menu, but it didn't seem to do anything when I ran super pi.

    Anyone know the definitive answer to this? Thanks.
     
    jcy, Feb 23, 2006
    #1
  2. miner

    miner Notebook Nobel Laureate

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    The Celeron M does not have speedstep(EIST). So it wont be able to increase/decrease the clock speed. The only option would be to change the voltage only at the highest multiplier(or stock clock speed).

    Also increasing/decreasing the voltages wont change the performance. It will only help in decrease the heat and slightly reduce the power consumption. So your Super Pi scores will remain the same.
     
    miner, Feb 23, 2006
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  3. jcy

    jcy Notebook Enthusiast

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    That's fine, but it doesn't seem like any of the tools allow you to change the voltage at the highest clock speed either (1.6 in my case). Anyone have any luck with this?
     
    jcy, Feb 23, 2006
    #3
  4. chinna_n

    chinna_n Notebook Deity NBR Reviewer

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    That is what Miner was trying explain. Without EIST, these softwares( either CHC or RMClock) can not regulate voltage or steppings at all.
     
    chinna_n, Feb 23, 2006
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  5. jcy

    jcy Notebook Enthusiast

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    He did mention that you can change the voltage at the highest clock speed. Has anyone done that?
     
    jcy, Feb 23, 2006
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  6. miner

    miner Notebook Nobel Laureate

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    Well, it seems I was wrong about undervolting at the highest clock speed. Without EIST there seems to be no way of undervolting(well atleast according to the author of RM Clock...)
    http://forum.rightmark.org/topic.cgi?id=6:304
     
    miner, Feb 23, 2006
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  7. warlord

    warlord Notebook Consultant

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    I attempted (before my overclock) to undervolt my Celeron M 1.4Ghz and was unable to do so.
     
    warlord, Feb 23, 2006
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  8. Scratchy413

    Scratchy413 Notebook Enthusiast

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    Yea, I haven't been able to undervolt my 380 either. Guess we'll have to wait for
    some to release a package that will do it. If it is possible at all that is..
     
    Scratchy413, Feb 24, 2006
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  9. chinna_n

    chinna_n Notebook Deity NBR Reviewer

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    chinna_n, Feb 27, 2006
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  10. mikhail_scosyrev

    mikhail_scosyrev Notebook Consultant

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    why would you want to undervolt it? does it get warm? mine is always cool (of course I don't really use it on the batter either...)
     
    mikhail_scosyrev, Jun 10, 2006
    #10