I would like to request Bios for Nvme m2 recognition for the Biostar Hi-Fi H77S Ver. 5.x
Follow the guide here: [HowTo] Get full NVMe Support for all Systems with an AMI UEFI BIOS - Special Topics / NVMe Support for old Systems - Win-Raid Forum (level1techs.com)
EDIT: Use UBU to update the cpu mcodes, it will get more space in the DXE volume and then you can insert the NvmExpressDxe_5.
Use the MMtool 4.x method.
Compare both mod and original according the guide for any original/missing pads.