Gigabyte Z270X-Gaming 7 Doesn't See Samsung Pro 950 M.2 Drive

Ok. Brand new system I'm building, having a problem with my Gigabyte Z270X-Gaming 7 motherboard detecting my Samsung Pro 950 NVME M.2 drive. It will show it in BIOS under Intel Storage Technology, but under NVME Configuration, it says 'No NVME device found". Ultimately, I want this drive to be my primary OS boot drive.

Here's the things I've tried...

1- Updated board to newest F8A firmware
2- Booting with CSM Enabled and Disabled
3- Storage Boot Option Control and Other PCI Devices in both Legacy and EUFI (and various combinations).
4- Disconnecting all SATA devices
5- Opened command prompt from Win10 installation to run disk part...doesn't see the drive
6- Installed Win10 on SSD drive, then ran disk manager and disk part... doesn't detect the drive.
7- After install, also tried Samsung Magician software.

I was going to try loading the driver files from a 2nd USB drive during install, but I can't find anything other than Samsung's .exe file...and it won't let me install it on my other computer because it doesn't detect anything.

Very frustrated by this whole process. Any help anyone can give me would extremely appreciated!!!
Reply to andrew.hafey
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More about gigabyte z270x gaming samsung pro 950 drive
  1. FOLLOW UP: I got it to work, but only if I removed my 2 SSD drives from a RAID configuration and default the BIOS. It'll see the M.2 as it's supposed to. As soon as I turn RAID back on, it can't see it anymore. I'm guessing there's no way to do both, but hoping someone out there knows a work around.
    Reply to andrew.hafey
  2. The background here is NVME SSDs do not appear within the BIOS until Windows creates the system partition with the EFI Boot Sector. Your M.2 SSD contains UEFI driver information within the firmware. By disabling the CSM module Windows will read and utilize the M.2-specific UEFI driver.

    1- The M.2 drive has to be the only drive installed. You can set SATA configuration to RAID as it is permissible to install single drive in a RAID configuration.

    2 - Go into the bios, under the boot tab there is an option for CSM, make sure it is disabled.

    3 - Click on secure boot option below and make sure it is set to other OS, not windows UEFI.

    4 - Click on key management and clear secure boot keys.

    5 - Insert a USB memory stick with a UEFI bootable ISO of Windows 10 on it, USB3 is quicker but USB2 works also. A Windows DVD won’t work unless you’ve created your own UEFI Bootable DVD.

    6 - Press F10 to save, exit and reboot.

    7 - Windows 10 will now start installing to your NVME drive as it has its own NVME driver built in.

    8 - When the PC reboots hit F2 to go back into the BIOS, you will see under boot priority that windows boot manager now lists your NVME drive.

    9 - Click on secure boot again but now set it to WIndows UEFI mode. (see #3 above)

    10 - Click on key management and install default secure boot keys

    11 - Press F10 to save and exit and windows will finish the install. Once you have Windows up and running, shutdown the PC and reconnect your other SATA drives.

    I would also recommend installing the Samsung NVME driver at this point to replace the Windows one. (optional)
    Reply to Calvin7
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