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    Can't Undervolt CPU in Bios - Clevo P870DM3-G

    Discussion in 'Sager and Clevo' started by Kaje85, Dec 18, 2017.

  1. Kaje85

    Kaje85 Newbie

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    Hi guys,

    I can undervolt my CPU via the fairly poor OC utility provided with the laptop/Control Centre, but it always seems to reset when I restart. I've had a look in the BIOS, and I can see the options I need, but I can never get the voltage value below 0 despite it clearly giving the range as -500 - 500.

    I can turn it up, but not down. What am I doing wrong?
     
    Kaje85, Dec 18, 2017
    #1
  2. Meaker@Sager

    Meaker@Sager Company Representative

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    The option is not available in the stock BIOS.
     
    Meaker@Sager, Dec 18, 2017
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  3. Prostar Computer

    Prostar Computer Company Representative

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    This is common behavior on the stock BIOS, but I can't speak for a modded one. If you're seeing the voltage options you said you need in the BIOS setup utility, I'm guessing you're using the PREMA mod, in which case you may want to confer with Prema directly.
     
    Prostar Computer, Dec 19, 2017
    #3
  4. Prema

    Prema Your Freedom, Your Choice

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    Nope, there are some stock BIOS with more options...which doesn't mean that they are not constrained of blocked from working...most DM-series BIOS force an under-volt of 100mV- and hence the voltage option isn't working.
    Those user like the one above should use Throttlestop to change it in OS.

    P.S.: In the PremaMod version those changes also work on BIOS level as that was something that had to be fixed...
     
    Last edited: Dec 19, 2017
    Prema, Dec 19, 2017
    #4
    KY_BULLET, martin darlington, Papusan and 2 others like this.
  5. Meaker@Sager

    Meaker@Sager Company Representative

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    It was introduced in the KM series onwards as a standard option.
     
    Meaker@Sager, Dec 19, 2017
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  6. Jaces9900

    Jaces9900 Notebook Consultant

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    any pointers on what is a good setting to start with , as i have a HID prema bois current , i7 6700k delid , 64gb ram ....
     
    Jaces9900, May 30, 2018
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  7. Meaker@Sager

    Meaker@Sager Company Representative

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    Start from stock and start dropping the voltage if you are looking to undervolt.
     
    Meaker@Sager, May 30, 2018
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  8. Jaces9900

    Jaces9900 Notebook Consultant

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    where should i start of undervolting ...
     
    Jaces9900, Jun 9, 2018
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  9. Meaker@Sager

    Meaker@Sager Company Representative

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    From the beginning, drop a step, test and repeat until a failure occurs then raise it a couple of steps.
     
    Meaker@Sager, Jun 10, 2018
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  10. Jaces9900

    Jaces9900 Notebook Consultant

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    i am not sure how to start that is my issuse , what do i use the bios or the clevo app or intel app or other??
     
    Jaces9900, Jun 22, 2018
    #10
  11. MrClippy

    MrClippy Notebook Enthusiast

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    It's up to you which one to use. But don't use a combination as it could cause miscalculations from one offset over another. I'd say the easiest to use is Throttlestop, but if you have PremaMod that probably has more features. Intel also has a large set of features, and I believe that it's usually tied to the clevo app unless you set it to not be installed with the clevo control center. The stock BIOS is probably the most barebones of all the methods. I think stock bios has an option somewhere under overclock tab. I personally use Throttlestop so that voltages aren't saved if something goes wrong and I'm just used to using it across different computers.

    For reference, my last 6700k could hit -110 Mhz undervolt stable at 4.3 Ghz all cores. But how much you undervolt greatly depends on how much you intend to overclock; usually the higher the overclock, the less you can undervolt or else BSOD will be a frequent occurence. Pick your clock speed, and then like Meaker@sager said undervolt in small increments of, say, 5 Mhz.
     
    MrClippy, Jun 22, 2018
    #11
  12. Meaker@Sager

    Meaker@Sager Company Representative

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    It also depends on your chip, some will undervolt more than others.
     
    Meaker@Sager, Jun 22, 2018
    #12