I have the M8F Motherboard and I recently install the OCZ RD400 M.2 SSD. The Main problem is that after a Winodws 10 restart the M.2 drive is not recognizable (I know this because of the boot options that is empty) anymore. I have the following configuration on the bios:
CSM disabled
Secure Boot Other OS
Version 1902
The drive reappears only after a turn off and turn on. I tried to put the secure boot to Windows UEFI, but did not work. Sometimes bios is stuck on code 80 (debug). I don't know if this is related to Secure Boot Keys (or bad Windows 10 installation), because when was trying to setup the SSD, I selected the "Save Default Secure Boot Keys" options on the bios.