From X11SAE-M BIOS, there is the item "SATA RAID Option ROM/UEFI Driver" under Advanced >> SATA Configuration.
Could you advise why modifying it from "Legacy ROM" to "UEFI Driver", then I can't see Intel RAID Option ROM pop-up during POST, also no access by pressing "Ctrl + i" to CONFIG Intel RAID?
Soft remind, if modify BIOS item "SATA RAID Option ROM/UEFI Driver" to "UEFI Driver", then save and reboot.
You will see "Intel RSTe SATA Controller" under "Advanced" page, you can CONFIG Intel RAID by this item, thanks.