Hi , please see this video , -->
https://www.youtube.com/watch?v=No-ct8pQcIg The drive is not visable straight away in the BIOS , disabling the CSM module Windows will read and utilize the M.2-specific UEFI driver. You must use a UEFI Bootable version of Windows. Your Windows DVD won’t work unless you’ve created a UEFI Bootable DVD.
M.2 AHCI SSDs do not appear within the BIOS until Windows creates the system partition with the EFI Boot Sector.