As the title states, the BIOS is not recognizing the m.2 drive at all. Windows installer sees the drive and Windows will install to it... but when it comes time to boot it's not recognized as a bootable device. The m.2 in question is the Samsung xp941. I heard that early on a lot of people were having issues making this drive bootable early on. All might be ok anyway, as these things apparently get hot enough to boil water and I'm not sure I want that fixed to my motherboard without a heatsink & fan. An adapter card my be in order... but I'd still like to figure out if I'm going to be able to make it bootable.
I don't have the latest BIOS yet, so I will try that first and report back. (the change logs don't mention anything about adding more m.2 support though)