The original M.2 which was in the machine when it was purchased did not appear in the BIOS or when I tried to install Windows 10; therefore, I tried a new M.2, which I knew to be working. The M.2 is not downwards as it have an 'M' key. Both M.2s I tried are in the slot and the screw secures them in place. I rebooted many times - I do not see 'fast boot' in the BIOS. All I see is a legacy BIOS from American Megatrends 2022 (not UEFI), which very few options. Less options than I get from an AliExpress motherboard I have used to build budget gaming Xeon builds.
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