Asus Maximus Formula NVME mod

[MeatWar]

EFI bioses were to the Asus P5Q series, you can try this tool/guide:
https://winraid.level1techs.com/t/experimental-modded-vmware-nvme-option-rom-for-amibios8-core-legacy

[Experimental] NVMe Option ROM - BIOS/UEFI Modding / BIOS modules (PCI ROM, EFI and others) - Win-Raid Forum (level1techs.com)

https://winraid.level1techs.com/t/guide-nvme-boot-for-systems-with-legacy-bios-and-uefi-board-duet-refind

https://winraid.level1techs.com/t/guide-nvme-boot-without-modding-your-uefi-bios-clover-efi-bootloader-method

OR buy a Samsung 950 Pro, it has its own NVMe Oprom.