As the title says I have a x570 pro wifi motherboard, it has 2 nvme slots and while my first nvme shows up the second does not. I have reinstalled windows 10, updated to latest bios, looked into disk management (not there even after rescan), looked in bios (not there only see my first one) and device managers. (Nvme worked when testing on different motherboard so it should be okay), also reseated it a few times in the process.
Are you using any SATA ports or PCI slots? Some motherboards don’t let you use every slot and port together, so I’ve seen it where I moved my SATA disk to another port and then nvme slot 2 started working.Sorry, I remembered this the wrong way around: At least on B450 (not sure about X570) when an nvme drive is plugged in then some SATA ports are disabled.
Yeah I remember reading that if you use the second nvme slot you might go down to x8 instead of x16 for the pcie slot the gpu is in but I didnt see anything mention that you are not able to use the pcie slot then. (I am not totally well read in this subject however)
Try booting with just the one that isn’t being recognized in. Try swapping their placement and have just the os drive in but in the slot that isn’t recognizing the one drive.
Unfortunately my boot drive switched to back slot is not being recognized :(, so this might be an issue with the slot itself
Check in the bios to see if you have to turn the slot itself on. Also check forums to see if anyone else has this issue.