M.2 NVME SSDs not recognised in BIOS

[Probro968]

Hello folks.

I just finished assembling a new PC, and the BIOS does not show the two M.2 NVME drives that I installed.

Aorus Master X570 mobo - Flashed latest BIOS ver F11.
AMD 3900X
In slot M2A: Sabrent 1TB Rocket NVMe 4.0 Gen4 PCIe M.2 Internal SSD
In slot M2C: BPX 480GB 2280 M.2 PCIe 3.0x4 NVME SSD
G. Skill F4-3600C16Q-64GTZNC
RTX 2070 Super

Tried disabling CSM, no joy.

Thanks in advance.

[MazeFrame]

According to the manual, all 3 slots support SATA and PCIe. Having a PCIe SSD in slot M2C (lowest) disables sata port 4 and 5.

I would suggest using the slots like so:

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Do you have another system to test if the drive is faulty?

[Probro968]

Thanks for the suggestion.

Moving the SSD from slot M2C to M2B made it show up in the BIOS. I am embarassed to admit that I think the problem was just incomplete seating of the drive.

I had to pull the video card to get to the SSD in the M2A slot, and reseated that one as well.

Now both are appearing in BIOS.

Thanks!