I've just finished building a new PC using an Aorus Master B550 with 3 drives total, a 500GB Corsair MP600, a 1TB Samsung 860 QVO and a 2TB Seagate HDD. The Samsung and Seagate drives both showed up in the BIOS and Windows installer, but the Corsair drive didn't. I've tried putting it in all 3 M.2 slots, but haven't been able to get it to show. I've since installed Windows on the Samsung drive so I can at least use the PC but really want to get it transfered over to the Corsair drive so im not taking up space on the Samsung.
If anyone has any idea what sort of troubleshooting steps I could take it would be much appreciated.