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    Ineffective Undervolting

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by utprabh, Jul 29, 2009.

  1. utprabh

    utprabh Notebook Consultant

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    Hey..I just tried out undervolting on my Studio 1555 based on the guide given by Flipfire....
    Unfortunately i havent been able to really get impressive results...
    The Idle temp for the two cores is around the same before and after undervolting..
    though the temp on load reduces a bit by around 6-5C...

    All my Multipliers cud only go as low as 1.000v..and all r stable at that meaning it cud be possible to go lower if the option was available..
    is there any way by which I can improve my readings etc?
     

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  2. moral hazard

    moral hazard Notebook Nobel Laureate

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    well you can do a volt mod to reduce the volts some more.
     
  3. utprabh

    utprabh Notebook Consultant

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    and how is a volt mod done?
     
  4. c19932

    c19932 Notebook Guru

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    i would like to know how to do a volt mod also. my second highest multiplier can be run with the lowest vid -.- and also what is the risk of a volt mod?
     
  5. nu_D

    nu_D Notebook Deity

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    Ya, that sounds about right.

    When I did it I was really bummed that the idle temperatures were the same. It's only under load you notice any difference. I was expecting to go from 43C to 35C idle, not 80C to 70C when the CPU is being pushed.
     
  6. moral hazard

    moral hazard Notebook Nobel Laureate

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    Basically you have to connect some CPU pins :eek:

    here is a link:
    http://forum.notebookreview.com/showthread.php?t=390696&page=9

    there is a lot more info on this, so do a search of this forum and a google search.

    If you do decide to do the volt mod, while you have the notebook open you should clean out the dust and change the thermal paste. That should cool it down a bit :cool:
     
  7. utprabh

    utprabh Notebook Consultant

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    hmmm...i am kind of a noob when it comes to opening the laptop and doing stuff in it..so i better not take the risk.. :D

    and btw moral hazard thanks for the link..ill try it out maybe someday... :D
     
  8. TevashSzat

    TevashSzat Notebook Deity

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    Reducing max load temps by 5-6C is pretty good for undervolting. It is nowhere near the best but its still good. Volt-modding is doable but its pretty hardcore in that you can seriously screw up something so if your temps right now are alright, I'd leave it alone.
     
  9. MatthewRuddy

    MatthewRuddy Notebook Consultant

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    I don't think you have undervolted the other multipliers correctly.. Set your highest multiplier to 1.0V then tick the "Auto-Adjust" box and it should mathematically adjust the other multipliers. You have made the voltage of the x6 multiplier for example. higher than normal rather than normal, so when you processor speed steps to 1Ghz when it is not really being used, your laptop will actually run hotter than it should.. Probably the reason for your not so impressive idle temperatures as your processor is probably only running at 1Ghz idle like mine.. (mine is an T5750 Core 2 Duo 2Ghz)

    I know you said it can only go as low as 1.0v, but I'm pretty sure the x6 multiplier again comes stock around 0.9v on most CPU's? Sure you didn't put the voltage up rather than down? Click the defaults button to see whether I am correct or not.

    Here is a picture of my voltages to give you some guidance:

    [​IMG]
     
  10. utprabh

    utprabh Notebook Consultant

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    well I did the default setting and the stock value for my 6x is 1.000v...

    I tried the "Auto-adjust intermediate state" options with my max 10x at 1.000v but it remains the same i.e all multipliers are at 1.000 v...

    I wonder wts the problem...
     

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  11. moral hazard

    moral hazard Notebook Nobel Laureate

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    step 1: set it all back to default.
    step 2: click "Auto-adjust intermediate state"
    step 3: set the 10x multi to 1.0000V

    do it in that order and it should work :)


    Or you could just set 10x to 1.0000V and then untick the 10x multi so now the highest is 9x. Find the lowest stable voltage for 9x and write it down.
    Then untick 9x so now 8x is the highest multi. Find the lowest stable volatge for 8x. so on...

    Now enable all of the multipliers.
    So the voltage for 10x is 1.000V.
    The voltage for 9x is less than the voltage for 10x.
    the voltage for 8x is less than 9x...

    basically you want to follow the undervolting guide exactly.
    If you do the steps in the wrong order it doesn't work.
     
  12. utprabh

    utprabh Notebook Consultant

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    @Moral hazard-- watever I do the values dont go below 1.000v...i followed both the methods u have written...i think there is some kind of settings problem..
     

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  13. TevashSzat

    TevashSzat Notebook Deity

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    I believe some CPUs have their voltage locked to a specific interval by Intel so you may only be able to underclock to a certain point.
     
  14. utprabh

    utprabh Notebook Consultant

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    so then nuthin can be done?..my CPU's reached its saturation point?..damn, :(
     
  15. MatthewRuddy

    MatthewRuddy Notebook Consultant

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    So in the drop down menu it doesn't let you set the voltage of the x6 multiplier below 1.0v? =[
     
  16. utprabh

    utprabh Notebook Consultant

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    Nup!!!..thts the biggest problem..its kind of like limited to 1.000v...do u know of any settings which can change this?
     
  17. Mastershroom

    Mastershroom wat

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    In the "Advanced CPU Settings" tab, is your CPU type selection set to Mobile? Make sure it's that, and not Desktop or Auto-detect. When you change it, make sure to restart RMClock.
     
  18. utprabh

    utprabh Notebook Consultant

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    yea man..i did that several times..lol
    I noticed on the advanced CPU settings page on the right under Thermal Monitor 2 Target its locked at 1.000v...any way to change tht?
     

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  19. TevashSzat

    TevashSzat Notebook Deity

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    If all else fails and you really want to go under 1.000V, you can try Crystal CPUID. You can edit the inf files in it to go below any locked voltages.

    You, however, would be limited to 3 "steps."

    Check out my guide (in sig) for more information.
     
  20. utprabh

    utprabh Notebook Consultant

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    hmm...ill check tht out...thanks..
     
  21. MatthewRuddy

    MatthewRuddy Notebook Consultant

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    Mine is also locked to 0.095v.. Doesn't seem to be the problem.