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  1. #1
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    Asus Rog Strix Z390-F instability & QVL memory not working on XMP

    Hi everyone!

    I have serious problems to get my build running stable. I've seen that adjusting voltages might help. I have not really any knowledge in that field and I'm afraid I could damage somithing.
    First here is my build:

    • Windows 10
    • i9-9900k
    • Gskill F4-3600C17Q-32GTZR memory, 4x8GB
    • MSI RTX 2080 Ventus
    • BIOS 0602

    Drives:
    • Samsung M2 SSD 970 Pro
    • Samsung SSD 850 PRO
    • Samsung SSD 850 EVO
    • Legacy HDD
    • BlueRay Player

    As I turned the system on for the first time, it resulted in several reboots before it failed to BIOS. In the BIOS I set all to default, as there was no way to get the RAM running with the XMP profile, which now runs at 2133MHz. The system boots with that. I tested the RAM in memtest86+, no errors at all.

    I did some stress tests in Windows and as I closed them all of the sudden I got a bluescreen. Restarted the PC, did serveral things (nothing special) and after about 10 minutes another bluescreen. I read in different threads increasing the voltage might be helpful. As I have no idea what to change exactly, I thought enabling AI overclock might do some stuff with the voltage. I enabled it and yeah it helped. I started youtube, steam and other things parallel and the PC ran through the whole night. Played BF5, Witcher 3, DOOM the day after for a several hours and had no crashes.

    I thought that did the trick, but today I started the PC, immediately started DOOM -> bluescreen.
    I tried it again: boot -> immediately start DOOM -> bluescreen!
    Third try: boot -> do some "warm up" staff (starting different small programs) -> start DOOM -> works like a charm.

    So I have two questions:
    -Is my Strix a monday product and should it be replaced?
    -If no, is there any way to get this thing running stable and also the RAM at it's intended speed (3600 MHz)?

    As appendix I uploaded an image of my voltages

    I would really appreciate any help and thx in advance!
    Miniatura de Adjuntos Miniatura de Adjuntos 20190313_062815.jpg  


  2. #2
    ROG Enthusiast Array leerock360 PC Specs
    leerock360 PC Specs
    MotherboardMaximus XI Extreme
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    leerock360's Avatar
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    Set the dram voltage to 1.35 volts and select your xmp profile to run at 3600

  3. #3
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    Resetted the BIOS to optimized defaults and set the voltage to 1.35V and tried both (XMP1, XMP2), neither boots. The PC restarts several times and then stops with the message :"The system has POSTed in safe mode."

  4. #4
    ROG Guru: Green Belt Array Phillyflyer's Avatar
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    Quote Originally Posted by SirHanselot View Post
    Hi everyone!

    I have serious problems to get my build running stable. I've seen that adjusting voltages might help. I have not really any knowledge in that field and I'm afraid I could damage somithing.
    First here is my build:

    • Windows 10
    • i9-9900k
    • Gskill F4-3600C17Q-32GTZR memory, 4x8GB
    • MSI RTX 2080 Ventus
    • BIOS 0602

    Drives:
    • Samsung M2 SSD 970 Pro
    • Samsung SSD 850 PRO
    • Samsung SSD 850 EVO
    • Legacy HDD
    • BlueRay Player

    As I turned the system on for the first time, it resulted in several reboots before it failed to BIOS. In the BIOS I set all to default, as there was no way to get the RAM running with the XMP profile, which now runs at 2133MHz. The system boots with that. I tested the RAM in memtest86+, no errors at all.

    I did some stress tests in Windows and as I closed them all of the sudden I got a bluescreen. Restarted the PC, did serveral things (nothing special) and after about 10 minutes another bluescreen. I read in different threads increasing the voltage might be helpful. As I have no idea what to change exactly, I thought enabling AI overclock might do some stuff with the voltage. I enabled it and yeah it helped. I started youtube, steam and other things parallel and the PC ran through the whole night. Played BF5, Witcher 3, DOOM the day after for a several hours and had no crashes.

    I thought that did the trick, but today I started the PC, immediately started DOOM -> bluescreen.
    I tried it again: boot -> immediately start DOOM -> bluescreen!
    Third try: boot -> do some "warm up" staff (starting different small programs) -> start DOOM -> works like a charm.

    So I have two questions:
    -Is my Strix a monday product and should it be replaced?
    -If no, is there any way to get this thing running stable and also the RAM at it's intended speed (3600 MHz)?

    As appendix I uploaded an image of my voltages

    I would really appreciate any help and thx in advance!
    Set XMP Profile 1 ...make sure dram voltages is set to 1.35v and not auto....set both IO and SA voltages @ 1.20v rather than auto.
    Asus ROG Maximus XI EXTREME
    Intel i7 9900K OC'D @ 5.2 GHZ @ 1.345V (1.296V LOAD) LLC 6 PRIME 95 STABLE 8 HRS
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    Swiftech Drive II / Swiftech MCP35X Pump
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  5. #5
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    Just in case i would make a mistake. IO is CPU VCCIO Voltage and SA is System Agent Voltage, is that correct?

    I tried XMP 1 & 2, each time setting IO & SA to 1.2V still fails to boot.

  6. #6
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    Has anyone an idea why the system only works rather stable with AI optimization selected?

  7. #7
    ROG Guru: Green Belt Array Phillyflyer's Avatar
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    Quote Originally Posted by SirHanselot View Post
    Just in case i would make a mistake. IO is CPU VCCIO Voltage and SA is System Agent Voltage, is that correct?

    I tried XMP 1 & 2, each time setting IO & SA to 1.2V still fails to boot.
    Try manually setting memory rather than XMP....
    Set ...dram voltage to 1.35v...dram frequency to 3600 mhz..set dram timings to 17-18-18-38 - 2N...set IO and SA voltages to 1.20v ....see if this helps.
    Asus ROG Maximus XI EXTREME
    Intel i7 9900K OC'D @ 5.2 GHZ @ 1.345V (1.296V LOAD) LLC 6 PRIME 95 STABLE 8 HRS
    XSPC RX360 Rad (6)Scythe Gentle Typhoon 1850 RPM Fans In Push/Pull @ 1500 RPMS
    Swiftech Drive II / Swiftech MCP35X Pump
    Enermax Platimax 1200 Watt Power Supply
    32GB G.Skill F4-3866C18Q-32GTZR 3866 MHZ CL18 1.35V (OC 4266MHZ 17-18-18-41-2T @1.45V)
    MSI GTX 1070 SEA HAWK EK X SLI WITH ASUS HB RGB
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    (2) WD 1TB Black Edition
    Corsair 900 D

  8. #8
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    Some quick info because I have extensively tested the Z390-F, esp. regarding memory overclocking.
    Just set everything manually and disable all that AI-stuff. The board works far better than I had thought overall. 2 DIMM configurations go up to about 4050 for me (at 1.45v for my 3200 specced B-Die), 4 DIMM probably a few hundreds more. CPU oc also absolutely fine, just set VRM switching freq to 500KHz. And don't use more than LLC6, better LLC5.

    I know, not very helpful comment, but just to let you know. There might be Monday-products however, I don't know.
    Last edited by vvoid; 03-15-2019 at 02:23 PM.

  9. #9
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    Quote Originally Posted by Phillyflyer View Post
    Try manually setting memory rather than XMP....
    Set ...dram voltage to 1.35v...dram frequency to 3600 mhz..set dram timings to 17-18-18-38 - 2N...set IO and SA voltages to 1.20v ....see if this helps.
    Doesn't help either. Tried dram voltage up to 1.4v, sadly not success. Also tried LLC up to 6 like vvoid suggested, nope.

    Should I do a BIOS update? But I read on the forum that this makes memory stability only worse :/

  10. #10
    ROG Guru: Green Belt Array Phillyflyer's Avatar
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    Quote Originally Posted by SirHanselot View Post
    Doesn't help either. Tried dram voltage up to 1.4v, sadly not success. Also tried LLC up to 6 like vvoid suggested, nope.

    Should I do a BIOS update? But I read on the forum that this makes memory stability only worse :/
    Try updating to latest bios and apply manual settings as suggested...u have nothing to lose at this point...
    Have u removed the chip from board to inspect socket for possible bent pins ?
    Asus ROG Maximus XI EXTREME
    Intel i7 9900K OC'D @ 5.2 GHZ @ 1.345V (1.296V LOAD) LLC 6 PRIME 95 STABLE 8 HRS
    XSPC RX360 Rad (6)Scythe Gentle Typhoon 1850 RPM Fans In Push/Pull @ 1500 RPMS
    Swiftech Drive II / Swiftech MCP35X Pump
    Enermax Platimax 1200 Watt Power Supply
    32GB G.Skill F4-3866C18Q-32GTZR 3866 MHZ CL18 1.35V (OC 4266MHZ 17-18-18-41-2T @1.45V)
    MSI GTX 1070 SEA HAWK EK X SLI WITH ASUS HB RGB
    (5)Samsung 840 Pro 128 GB In Raid 0
    (2) WD 1TB Black Edition
    Corsair 900 D

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