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    STRIX Z270G - (A7) ME Firmware Downgrade - Request MeSpiLock Failed

    Motherboard model: STRIX Z270G Gaming

    UEFI Version: 1301
    (ME Version: 11.7.0.1229)

    CPU: Intel Core i7-7700K KabyLake

    Memory kit part number (s) and amount in GB: F4-3200C16Q-32GTZR 32GB

    GPU: EVGA GeForce GTX 970

    SSD/HDDs/Optical drives: Samsung 840 EVO 1TB, WDC Blue 4TB

    PSU: Corsair SF600

    USB Devices (model/version number):

    Razer Blackwidow Chroma Silent (v1.0) keyboard
    Logitech G9x Mouse
    Astro A40 DAC

    CPU Cooler: NOCTUA NH-D9L

    PC CASE: CaseLabs Bullet B4

    Operating system: Windows 10 64 bit Pro Microsoft Activated yes/no? YES


    Drivers Installed (include version info):

    Intel(R) Management Engine Interface V1914.12.0.1256
    Intel Chipset Device Software V10.1.18019.8144
    Realtek Audio Driver V6.0.1.6699
    Intel LAN Driver V12.17.8.7


    Any third Party temp/voltage software installed: None

    System Overclocked (provide details)?: Yes.

    Memory at XMP timings.



    Issue


    Every few cold boots, I see the "(A7) ME Firmware Downgrade - Request MeSpiLock Failed" issue.

    About 6 months ago I had updated my BIOS to 1301 from 906 (using default settings and updating the BIOS in order till latest) as well as some other ASUS drivers, all retrieved from the official ASUS support page for this motherboard, and that's when the issues started. Since then I've been getting different BSOD's in Windows and the Firmware Downgrade issue. The reason for the BIOS update was because 906 didn't have proper XMP support for my RAM.

    I tried the solutions of swapping from Secure Boot to Legacy and back, clearing the CMOS, updating the MEI, reverting back to previous BIOS, checking the system drive and RAM for inconsistencies, but nothing has worked so far. The system will appear stable for some time and then start having issues again out of the blue.

    I've reinstalled Windows 10 thinking it may be some issue with updating the BIOS and Windows 10 not liking it, but the same issues persist.

    I would appreciate any ideas to solve this.

    Thanks

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