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  1. #1
    New ROGer Array
    Join Date
    Mar 2021
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    10
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    M.2 Gen 4 problems

    Hi Guys,
    I am having an issue with my MB and a M.2 Gen4 M.2.

    First my hardware list:
    MB: ROG STRIX B550-XE GAMING WiFi (BIOS 1805)
    GPU: AMD Radion RX 5700 XT
    CPU: Ryzen 9 3900X
    SSD: 2 x M.2 Gen3 Sabrent Rocket Q SCSi Disks 1TB
    SSD: ScanDisk Ultra 2 960Gig
    HDU: 3

    This current configuration is running fine with no issues.

    The problem is I decided to upgrade my boot drive to a Gen for so ordered and received a Sabrent Gen4 disk which I would have though a straight sway and reinstall of OS etc would have been straight forward BUT, no :-( When I replaced the Gen3 with the Gen4 the computer would not boot and got stuck at error code 7C. I went online to investigate and followed every recommendation I could find. I disconnected all my Sata drives and removed the second M.2 drive, reset the bios to what the recommendations said but still a 7C error. The conclusion I cane to was a faulty M.2 so I sent it back and ordered a different drive a Corsair MP600 Gen 4 and as you probably have guessed it also stops at 7C (Its a pre-post state the stops the computer even getting to the bios screen). When Iput the Gen3 back in all works wonderfully.

    Can anyone out the help or advise what is going on?

    Regards,
    Dave G
    Last edited by SirBasher; 05-02-2021 at 10:31 AM.

  2. #2
    ROG Guru: Orange Belt Array Saltgrass PC Specs
    Saltgrass PC Specs
    MotherboardMaximus XIII Hero
    Processori9 11900K
    Graphics Card #1EVGA RTX 3090 FTW
    Sound CardOn Board
    MonitorDell AW3420DW
    Storage #1Samsung 980 Pro 2 TB
    Storage #2Samsung 860 Pro 1 TB
    CPU CoolerCooler Master Hyper 212X
    CaseCooler Master
    Power SupplyAntec HCP Platinum 1000
    Keyboard ASUS Strix Flare
    Mouse ASUS Chakram
    Headset/Speakers Logitech wired 5.1
    OS Win 10 Pro
    Network RouterROG Rapture GT-AX11000/AXE11000
    Accessory #1 VR Headset
    Accessory #2 Saitek X52

    Join Date
    Jan 2014
    Reputation
    10
    Posts
    344

    I am not familiar with the drives on your system, but the Samsung 970 (PCIe 3) was using a Samsung NVMe driver. When I tried to use it on the Samsung 980 Pro (PCIe 4) it had problems also.

    So, check what driver the Gen 4 is using and possibly put it back on the Windows standard NVMe driver.. If you already are, I could only suggest verifying the capabilities of the M.2 slots and what else may or may not work..

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