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Noob Here

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Atlantida
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Tuesday, January 22, 2019 6:51 AM (permalink)
Getting ready to upgrade to an EVGA z390 motherboard (still using z77/3770k)!  It's been a while since I upgraded and I have some questions regarding adaptive voltage.  Please shed some light for me.
 
1: Target adaptive voltage effects load or idle voltage?  Or does it simply set a static voltage regardless of load?
2: Offset voltage effects load voltage only?
 
I'll make an example.  Target voltage set to 1 volt and an offset of +.250 would equal to 1 volt idle and 1.250 volt load?  This is so you can adjust idle and load voltages independently?
 
Sorry it's been a while and I'm still used to manual voltages.  Some guides have conflicting info which left me more confused.
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    Sajin
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    Re: Noob Here Tuesday, January 22, 2019 4:50 PM (permalink)
    IIRC target adaptive voltage is your base voltage under load when in adaptive mode. The offset voltage is then used to add extra voltage to the base voltage when under load, so it basically helps you fine tune the base voltage. If you're overclocking I'd recommend using the override mode instead, so you don't have to worry about voltage fluctuations as the vcore will always be fixed when under idle & load conditions.
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    Delirious
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    Re: Noob Here Tuesday, January 22, 2019 5:46 PM (permalink)
    From what I've seen is the adaptive voltage (load line calibration) can work in this way.    
    1. intel spec for vdroop
    2. disabled where you don't have any voltage drop and keep a static voltage both at idle and load
    3. Allows for vdroop at different levels (marked as positive percentages on the new boards)
    4. Added vcore over idle when loads are applied (marked as negative percentages on the new boards)
    5. Auto function.   The bios adjusts vdroop according to you overclock.  Probably for people that don't want to screw with it. 
     
    The only problem with adding vcore to to idle voltage under load is that when the load is removed, there is a voltage spike that could kill you CPU at very high offsets.  Make sure you know Vmax for you CPU so that you don't do that.   Nice thing about the dark is that it has a probelt you attach to the MB to get real  time voltages.   
     
    You asked about idle voltages and how offsets affect that.  From what I've seen in my own experiments, the idle voltage increases only a fraction with each incremental change in offset towards adding voltages under load.  I mean minimal.   like 0.001 - 0.002 volts.  (I could also be misinterpriting that as voltage ripple since it varies based upon process that are occuring the background like OS system resources)  far as I can tell, idle voltages are not effected with subtraction or addition of vdroop after set in the bios.   I have not experimented with increased vdroop and how that affects idle vcore.   Might do that soon.  I'm predicting it won't matter. 

    "Be quick to listen, slow to speak and slow to anger" 
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    Atlantida
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    Re: Noob Here Tuesday, January 22, 2019 10:47 PM (permalink)
    So to reiterate (please correct me if I'm wrong)
    1: target voltage in adaptive mode only effects load voltage and offset values only effect the target voltage.
    2: vdroop can be used to control idle voltages with varying levels of control through out load stages with certain bios)
     
    Can vdroop fail safe against load voltage spikes in adaptive mode? 
    How does the bios know what to set idle voltages to?  Does it use a VID based on the CPU model?  I assume this all ties in with c states and turbo boost?  I remember having to use variable resistors to control vdroop before it was a setting in the bios.  Times have changed. 
     
    TY for all the info guys.
    post edited by Atlantida - Tuesday, January 22, 2019 11:03 PM
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    Delirious
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    Re: Noob Here Tuesday, January 22, 2019 11:49 PM (permalink)
    https://www.tweaktown.com/guides/8481/coffee-lake-overclocking-guide/index.html
     
    read this
     
    LOL.  I still have  board I use at one of my offices that has a variable resistor.  you are right.  Those were the days. 
    post edited by Delirious - Wednesday, January 23, 2019 0:01 PM

    "Be quick to listen, slow to speak and slow to anger" 
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    Atlantida
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    Re: Noob Here Wednesday, January 23, 2019 0:09 PM (permalink)
    A nice read.  I will absorb it like a sponge.  Sorry for all the questions.
    post edited by Atlantida - Wednesday, January 23, 2019 2:29 AM
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    Delirious
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    Re: Noob Here Wednesday, January 23, 2019 0:35 PM (permalink)
    sorry?   that's why there's a forum  and we welcome you.   

    "Be quick to listen, slow to speak and slow to anger" 
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    education may be expensive but wait until you get the bill for ignorance
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    Sajin
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    Re: Noob Here Wednesday, January 23, 2019 2:38 AM (permalink)
    Atlantida
    So to reiterate (please correct me if I'm wrong)
    1: target voltage in adaptive mode only effects load voltage and offset values only effect the target voltage.
    2: vdroop can be used to control idle voltages with varying levels of control through out load stages with certain bios)
     
    Can vdroop fail safe against load voltage spikes in adaptive mode? 
    How does the bios know what to set idle voltages to?  Does it use a VID based on the CPU model?  I assume this all ties in with c states and turbo boost?  I remember having to use variable resistors to control vdroop before it was a setting in the bios.  Times have changed. 
     
    TY for all the info guys.


    1. I believe that is correct.
    2. No.
    3. I believe so.
    4. Most likely based off vid.
    5. Most likely.
    6. Yep.
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