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  1. #1
    ROG Guru: Black Belt Array Hopper64 PC Specs
    Hopper64 PC Specs
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    Memory Training R6EO-Don't throw stones

    Well, I'm sure you guys are sick of me posting about this. I could not get this 4000MHz memory stable in my signature. Tweaked the VCCIO and VCCSA voltages, but no go so I just stayed with XMP and decreased the frequency to 3733. Worked well for a while, but then had a CPU 22 code that hung for a few minutes a few days ago. The machine then booted in windows with no error. I thought it's still unstable and looked over everything again.

    I kept my CPU OC as it was and then checked the VCCSA Voltage only. Baseline was 0.81V with memory frequency changed back to 4000. I figured I would try again to tune these settings. I bumped the VCCSA only to 0.82V and had an EC code on reboot. The machine only has an issue with memory training. All the stress tests I have thrown at it have passed with no problem. It's just cold boot memory training only. I was shooting between 0.95 and 1.00V previously with the VCCSA.

    I then added 10mV more. I have not had one boot failure/error in 3 days. I have cold rebooted numerous times without issue. The VCCSA is at 0.83V now with the VCCIO at baseline. Just an update. Hope it stays this way.

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  2. #2
    ROG Member Array Spoons PC Specs
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    MotherboardRampage VI Extreme Omega
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    Quote Originally Posted by Hopper64 View Post
    Well, I'm sure you guys are sick of me posting about this. I could not get this 4000MHz memory stable in my signature. Tweaked the VCCIO and VCCSA voltages, but no go so I just stayed with XMP and decreased the frequency to 3733. Worked well for a while, but then had a CPU 22 code that hung for a few minutes a few days ago. The machine then booted in windows with no error. I thought it's still unstable and looked over everything again.

    I kept my CPU OC as it was and then checked the VCCSA Voltage only. Baseline was 0.81V with memory frequency changed back to 4000. I figured I would try again to tune these settings. I bumped the VCCSA only to 0.82V and had an EC code on reboot. The machine only has an issue with memory training. All the stress tests I have thrown at it have passed with no problem. It's just cold boot memory training only. I was shooting between 0.95 and 1.00V previously with the VCCSA.

    I then added 10mV more. I have not had one boot failure/error in 3 days. I have cold rebooted numerous times without issue. The VCCSA is at 0.83V now with the VCCIO at baseline. Just an update. Hope it stays this way.

    Click image for larger version. 

Name:	Voltages 1 031219.png 
Views:	0 
Size:	28.1 KB 
ID:	79530

    Click image for larger version. 

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Views:	0 
Size:	196.5 KB 
ID:	79531

    Click image for larger version. 

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ID:	79532
    More voltage 1.35v try 1.40v first b4 any other changes

  3. #3
    ROG Guru: Black Belt Array Hopper64 PC Specs
    Hopper64 PC Specs
    MotherboardAsus R6EO Bios 0702
    Processori9 9900X @ 4.9 1.28V VCore
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    Quote Originally Posted by Spoons View Post
    More voltage 1.35v try 1.40v first b4 any other changes
    It's working great. Very stable now. No need for any changes at this point.

  4. #4
    Administrator Array Silent Scone@ASUS's Avatar
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    Glad to see you stuck with it. These are non-linear rails that require a systematic approach to tuning, more so when dealing with larger densities like this.

  5. #5
    ROG Guru: Black Belt Array Hopper64 PC Specs
    Hopper64 PC Specs
    MotherboardAsus R6EO Bios 0702
    Processori9 9900X @ 4.9 1.28V VCore
    Memory (part number)GSkill F4-3600C16Q2-64GTZR
    Graphics Card #1EVGA 2080 Ti Kingpin
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    Quote Originally Posted by Silent Scone@ASUS View Post
    Glad to see you stuck with it. These are non-linear rails that require a systematic approach to tuning, more so when dealing with larger densities like this.
    And just a mere 20mV in the VCCSA did the trick. Thanks for the help.*

  6. #6
    ROG Guru: Black Belt Array Hopper64 PC Specs
    Hopper64 PC Specs
    MotherboardAsus R6EO Bios 0702
    Processori9 9900X @ 4.9 1.28V VCore
    Memory (part number)GSkill F4-3600C16Q2-64GTZR
    Graphics Card #1EVGA 2080 Ti Kingpin
    Sound CardCreative SB AE7
    MonitorAsus ROG PG349Q
    Storage #1Intel 905p M.2 360G
    CPU CoolerEKWB Velocity RGB and Revo XRes 140 D5
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    My conclusions were wrong. I have had more memory instability. Gradually increasing the VCCSA over the past week. Increased the VCCIO to 1.05. Still tuning when work allows.

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