I have a Gen8, have installed SME10 to a SSD in past but now have Proxmox and use VMs, however, mine was a used system when I got it, check the internal USB has not been populated with a Mem Stick and system is booting off that, mine had one and was setup to boot off that.
Secondly need to see what your BIOS settins are re HD, raid etc in the BIOS
Should add I also upgraded cpu to a non standard Xeon