I gave it a go, but have run into an issue the guide warns about. My post reporting the issue and asking politely for help, as requested in the guide - [HowTo] Get full NVMe Support for all Systems with an AMI UEFI BIOS - #7679 by buttersoft
EDIT: All fixed, with Fernando’s help. GA-B85-HD3 rev2.1 F4 BIOS (modded for NVME boot, and successfully tested) attached to this post.
B85HD32.F4.zip (2.9 MB)