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  1. #1
    ROG Junior Member Array
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    Nov 2015
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    Z390i Only 1 DIMM recognized ... will *not* boot with second DIMM installed

    Problem: Board Z390i - Only 1 DIMM recognized ... will *not* boot with second DIMM installed

    CPU: i5 9600k

    RAM: RAM G.SKILL TridentZ Series 16GB (2 x 8GB) 288-Pin DDR4 4000 (PC4 32000) Model F4-4000C19D-16GTZ

    Each works in DIMM slot 1, but, machine will *not* boot with second DIMM installed in slot 2.

    Updated the BIOS... to 2417 (6/3/2019) ...still not working.

    Not running terribly with one DIMM... went ahead with stock (out-of-the-box) OC anyway ...5gHz on cpu & 4300mHz on ram. *Totally Stable* during 4 hr. bench test.

    Would be nice to have 16GB of ram though... any thoughts???

    thanks in advance

    dennis
    Last edited by dennislarock; 07-13-2019 at 09:49 PM. Reason: Bios Update

  2. #2
    ROG Guru: Brown Belt Array NemesisChild PC Specs
    NemesisChild PC Specs
    MotherboardASUS Maximus X Hero (WI-FI AC)
    ProcessorIntel i7 8700K
    Memory (part number)G.Skill F4-3600C16D-16GTZR
    Graphics Card #1Nvidia GTX 1070 Ti FE
    Graphics Card #2Nvidia GTX 1070 Ti FE
    MonitorASUS ROG Swift PG278Q
    Storage #1Samsung 970 PRO 512GB NVMe M.2
    Storage #2WD Black 2TB 7200 RPM 64MB Cache
    CPU CoolerNZXT Kraken X42
    CaseCooler Master HAF 932 Advanced
    Power SupplyEVGA SuperNova 1200 P2
    Keyboard Logitech G910 Orion Spark
    Mouse Logitech G703 Wireless
    Headset Logitech G Pro
    Mouse Pad SteelSeries
    OS Windows 10 Home x64 (UEFI)
    Network RouterLinksys WRT1900AC
    NemesisChild's Avatar
    Join Date
    Sep 2011
    Reputation
    89
    Posts
    1,788

    Try loosening the cold plate on your CPU cooler. It can cause memory issues as you describe if it's too tight.

    Good luck!
    Intel i7 8700K@ 5.2GHz (Delidded)
    ASUS Maximus X Hero (Bios 1801)
    NZXT Kraken X42
    G.Skill TridentZ@ 4000MHz CL16 2x8GB
    SLI: 2x Nvidia GTX 1070 Ti FE@ 2025/2025MHz
    OS: Samsung 970 PRO 512GB NVMe M.2
    Storage: Samsung 960 EVO 500GB NVMe M.2
    Storage: 2x Samsung 850 EVO 500GB
    Storage: WD Black 7200 RPM 64MB Cache 2TB
    EVGA SuperNova 1200 P2
    Cooler Master HAF 932 Advanced

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