I now have the board installed in the case. I can enter BIOS and make changes to most of the items it allows access to.
For storage, I have a Samsung 950 PRO Series - 512GB PCIe NVMe - M.2 and a Samsung 750 EVO 500gb internal drive.
From the BIOS, I cannot "see" the NVME drive. It basically says I don't have any devices using either of the M.2 slots although I can see the 950 Pro in the front (M.2 P) slot. This drive is formatted for late versions of Mac OS 10 as is the 750 Evo.
I am able to install the 950 pro in an internal enclosure and am able to access it (Format, write to it, read from it, etc.) via USB from my MacBook Pro. Should I format it in a native Windows format to be able to see it from the BIOS? Just a thought.
Second, I'm using Clover as a boot manager. When I exit the BIOS, Clover launches but offers no choices for booting. I have an OS installer on a USB thumb drive. I have used Clovers before this way and it has always shown all of the disks (SSD and HDD) physically to the motherboard. But, neither the NVME drive or the internal SSD are offered. Only the basic Clover options show up.
Thanks for any suggestions. Oh, I thought this issue was a faulty MB and the seller offered to replace the original MB. So, this is the second MB and the new one is the same as the first. Thanks again...