I have a MSI Z77A-G45-Thundrbolt and could use a modded BIOS to get native NVME support. https://us.msi.com/Motherboard/Z77AG45_Thunderbolt/support
Currently using DUET, but it doesn’t work all the time.
I’ve found this post, but my Thunderbolt mobo uses a different BIOS file, so I don’t think it is wise to use it.
Nicelly done, correct volume insertion and no pad files removed, a pad is present in the original and mod, flash it only with M-Flash, NOT OS environment.
But before, i suggest you do a backup of the current system bios as it contains its own motherboard original data, FPT8 tool as cmd line: FPT -d fullSPI.bin or FPT -bios -d biosREG.bin
Or other familiar tools to you.
While the PC is booting, continually tap Delete key until you enter the BIOS.
Select Live Utilities Update/M-Flash from the middle box on the right side of the screen.
Select M-Flash
(I would back up your current BIOS at this point if you don’t have it, as well as BIOS Settings/configuration).
Select Update BIOS
Select one file to update BIOS option and point it to the above BIOS file on a USB drive.
Cross your fingers and flash it.
From memory I had to boot back to the BIOS setup and select the newly detected NVMe drive as the 1st boot option.