Lets be clear on one thing…no one’s here to provide any, so called “safe” bios mod files, this is a user side risk and he only engages if he wants…and we all take our chances, users you can’t afford such risks should stay put.
The method provided here on this forum, for adding the NVMe DXE driver support for AMI bios, is quite safe but the flashing operation has its own issues, as the resulting file will be a “modified” file and that is what OEM/Bios vendors triy to prevent in a system, so when know methods of flashing has no success, it only remains the user to engage in to “deeper” actions by Intel FPT tool or a SPI IC programmer.
Follow the guides:
[HowTo] Get full NVMe Support for all Systems with an AMI UEFI BIOS - Special Topics / NVMe Support for old Systems - Win-Raid Forum
You may share the mod file for quick verification of the inserted DXE in the correct bios volume, before any flashing attempts.
The .522 bios file has indeed the CSMCORE in vol1. so, as you will learn, this will be the correct place for insertion, the “verification” step in the guide must be taken.
EDIT: Who would take such risk action with a client system and a server class asset…
Did you expect that it would be smooth and a one time only operation? Did you prepared yourself for a system rescue/re-programming…give me a break will you.
That this be a lesson for you and any other user that reads this thread.