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z390 dark vcore spikes

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streetglide420
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2019/03/23 05:26:55 (permalink)
Hey guys, I have a z390 dark, and an I7 9700k
 
i have my vcore set to override, and have it set at 1.39v however actual vcore under load is reaching 1.47v  via debug lcd
vcore doesnt even show up in HW monitor.
 
why? and is this normal?  i have tried adjusting vdroop settings. doesnt really help much.
post edited by streetglide420 - 2019/03/23 05:52:14
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    streetglide420
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    Re: z390 dark vcore spikes 2019/03/23 05:52:01 (permalink)
    with the board at default settings, and NO OC the chip is still hiting over 1.45v vcore........ WHY???? this doesnt make sense to me, but this board is new to me....
     
    my z390 ftw board did not behave like this.
     
    why is the vcore able to run free??
     
    #2
    Delirious
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    Re: z390 dark vcore spikes 2019/03/23 06:17:41 (permalink)
    if it's giving more vcore under load, the vdroop is set to a negative value.  more negative, the more vcore it will add.  
     
    download the intel extreme tuning utility to read vcore or try using eleet and see what vcore is.  
     
    https://www.evga.com/eleet/
    https://downloadcenter.intel.com/download/24075/Intel-Extreme-Tuning-Utility-Intel-XTU-
     

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    TahoeDust
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    Re: z390 dark vcore spikes 2019/03/23 09:05:22 (permalink)
    If you want 1.39v, set it to override ~1.382v and vdroop -25%.  It should come in right around 1.39v under load.
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    streetglide420
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    Re: z390 dark vcore spikes 2019/03/23 09:14:30 (permalink)
    Thanks guys, I think I'm figuring it out. This chip and board is much different than the last chip and board I was using when it comes to OC.

    This 9700k is taking 1.4v (-25% vdroop) to hit 5.2 stable across all stress testing and benchmarks.

    My 9900k before it died was 5.4ghz 1.39v on my z390 ftw.
    My silicon lottery winner, may it rest in pieces.
    #5
    albiss
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    Re: z390 dark vcore spikes 2019/03/25 17:38:08 (permalink)
    Delirious
    if it's giving more vcore under load, the vdroop is set to a negative value.  more negative, the more vcore it will add.  
     



    Shouldn't it be the other way around?!
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    Delirious
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    Re: z390 dark vcore spikes 2019/03/26 18:53:26 (permalink)
    albiss
    Delirious
    if it's giving more vcore under load, the vdroop is set to a negative value.  more negative, the more vcore it will add.  
     



    Shouldn't it be the other way around?!


    here are my tests:
     
    Total span of vdroop settings:
     
    The voltage gains are these: 

    -25% added 0.005 to vcore from what I put into the bios at idle
             added 0.003 to vcore under load.   Minor increase. 
    -50% added 0.005 to 0.01 to vcore from what I put into the bios at idle
             added 0.020 to vcore under load.  Small increase
    -75% added 0.01 to 0.013 to vcore from what I put into the bios at idle
             added 0.018 to 0.042 under load   Moderate increase
     
    the voltage drops are these:
     
    +90%    0.070 volts
    +75%    0.068 Volts
    +50%    0.048 Volts
    +25%    0.034 Volts
    Default   0.021 Volts
    Auto       0.016 volts 
     
    test performed at 5.1ghz.    C states and virtulization disabled. Windows set to max performance.    voltages read in Eleet and cpus stress was under intel extreme tuning utility.   I am sure you can try this with different CPU stressing programs.  I used the intel extreme tuning utility because the engineer of the board indirectly recommended it.  

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    #7
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