[x399 with multiple NVME m.2 drives]

FYI  BIOS F5i is now posted for download on the X399 Aorus Xtreme website:

    www.gigabyte.com/Motherboard/X399-AORUS-XTREME-rev-10/support#support-dl-bios

 

The BIOS is dated 2019/05/08 (08-MAY-2019) which is earlier than when it was sent to another owner as a beta BIOS to solve the detection of mixed (NVMe and SATA) M.2 SSDs, especially when there is more than 1 SATA M.2 SSD.

[x399 with multiple NVME m.2 drives]

On 1/23/2019 at 7:08 PM, darrenyorston said:

Resolved. Only the centre slot works with M.2 SSDs. To utilise the outer slots requires NVMe M.2 drives. The board will work with an M.2 SSD in the centre and an NVME M.2 drive in any of the others but not in any other config. So if you want multiple M.2 drives on the x399 Aorus Xtreme they have to be NVMe, regardless of what the specs say/dont say.

 

Thanks so much for posting this solution.  I have two M.2 SSDs, one is NMVe and the other one is SATA.  Initially I had the NMVe drive (my boot drive) in the middle (M2P) connector and the SATA drive in the top (M2M) connector.  This worked fine with BIOS versions F3 and F4, but not in F5 or its the later variants (F5c, F5c_n, F5g, F5g_n).  In all the F5 BIOS variants the NVMe SSD was still detected, but the M.2 SATA SSD was not.  Swapping the locations of the drives, with the SATA in the middle (M2P) connector and the NVMe in the top (M2M) connector, has both drives being detected with the newer F5 BIOS variants.  Thanks again for your help.