@Fernando - yes, I did not mention or even consider what BIOS type to use anything with, only said I have xx V5 tool that allows GAN and asked if you wanted to check to confirm (for the V/V5 one)
For the V3, I was only saying I had a newer version that allows GAN, than the version you mentioned, and was asking if you wanted a copy.
Also, many Aptio V BIOS do not support NVME too, so it's not only Aptio IV BIOS that may need NVME Mod

Hi there.
there is a problem with installing a new BIOS.
there is a mainboard ASUS Z87-c and it is not updated with the new BIOS.
I've tried clover (via BDU) to no avail.
what do you know about Z87-C that can help me???

Hello guys, I tried to do everything as described in the guide, however, this seems not to work for me. I have here a m2 drive with PCIe adapter and an old mainboard, which has a spare PCIe slot, so I thought to give it a try. However either the mainboard is just too old or I am doing something wrong (the m2 could be broken too, but I don't think so). Anyway, my mainboard has an EFI, however it is still this old style blue textual thing and not the fancy one with mouse and what not. It is based on B75 chipset. I know, I know, it is old and such... however, it still is enough for me and I don't see a reason to get something newer yet. This is actually this one:

http://www.ecs.com.tw/ECSWebSite/Product...155-LL-Intel-RR-

I added nvm module to the image and flashed it, the PC is booting, but nothing has changed. I read the ROM out again and I clearly can see the nvm part in there, but it seems not to change anything. What did I miss? Please don't tell, that it's an upgrade to a newer hardware :)

@Fernando - It's OK, but thanks, I did think maybe we didn't understand each other a little bit
See PM for file, you know how they can be sometimes, so not posting in public
I've edited plenty of mainboards (Desktop) that are Aptio V and not NVME compatible, yes many recent ones are now but not all still yet, and certainly not all older Aptio V ones either.
I agree, this should be put into a BIOS update from manufacturer if requested on a modern BIOS, but you know how those requests can be sometimes - usual answer is "Sure, we plan update release in next week/month" and then nothing or new BIOS come out in 2 months, still doesn't have it

@scorp - B75 should be fine with this mod. Be sure you do everything exactly as mentioned at step #4 in the "What should I do" section.
If you can't get it, upload your mod BIOS so someone can check to confirm your mod BIOS was done correctly.

@Lost_N_BIOS thank you for the reply, it gives me some hope. I went through the guide multiple times and tried different versions of ROM with UEFITool as well as with MMTool with same result. I can see nvm module in the ROM, but I can't see anything in the EFI/BIOS UI, the drive is just not there. The drive is new, however it still could be bad somehow, so I ordered a m.2 to SATA adapter to doublecheck this.

Here is my modified BIOS, may be someone can see, what I did wrong:
https://andjelo.de/cloud/index.php/s/gKd4nByQZ4pbnxP

By the way, I'm using linux and have no windows at all here, so I can't use afuwin and have to flash from a DOS Usbstick with afudos, but I think this shouldn't be a problem, what do you think? All the other programs seem to work fine in wine environment. But I'd be glad to know about your experience regarding this either.

I would really like to do a clean install of Windows 10 on a new NVMe adapter card plugged into a Dell Precision T7600. Those computers don't have a BIOS written for such a feat, but I'm hoping that someone here MIGHT have done it and created a post that will help a poor waif like me deal with any quirks. I've looked around the forums here, but I haven't yet spotted any controversy for C600 motherboards. I will say, though, that when I try to put the BIOS into EFI mode I get a message that states no such file exists. Whatever the heck that means.

I should also mention that my expansion card is a Qnine Dual M.2 PCIe Adapter with a pair of Crucial P1 1TB 3D NAND NVMe M.2 SSDs. After purchasing the SSDs I read at the Crucial site that they're not compatible with my computer, but I presume that only means not compatible without an expansion card.

I will now read Fernando's initial post on this matter and try to wrap my head around the project. Any help is really appreciated.

Hello !
First of all : thanks for everyone's contribution to this forum, this is a gold mine !

I try since a fiew days to made my computer ASUS GL552VW compatible with a Samsung 970 EVO 1TO NVMe, without success.
I've try to pass by Clover first, with the method describe >>here<<, but my SSD stil not visible when I lauch Windows Installer.
After many hours, I've decided to try modding my BIOS with this tutorial, and the result is the same.

This is my original BIOS, without mod : GL552VWAS304.zip
And this is the same BIOS modded as instructions with MMTool 5.02.0025 (4.50.0.23 didn't show entiers values) : GL552VW-AS_MODDED.zip
Do you know what I'm doing wrong please ?
Can I try something else ?

Thank you for this great work you do since years !

Thank you for this awesome guide! And thanks to all the people who posted their work-arounds to the issues they encountered.

After quite the struggle, I have successfully booted into Windows 10!

--- SPECS

MB: Asus P8Z68-V Gen 3
CPU: Intel i5 2500K
GPU: NVIDIA GeForce GTX 1060 (relevant)
SSD: Samsung 970 Evo Plus 500 GB NVMe

--- PROCEDURE

Modifying and flashing the BIOS went perfectly fine, but even though Windows 10 could see the disk, it refused to install to it, citing that the drive wouldn't be bootable. To remedy this:

I first had to remove my dedicated GPU and use the integrated GPU instead, or else my system would freeze following the next steps.
I then had to set the "PCI ROM Priority" value to "EFI Compatible ROM" within the BIOS.
Next, I booted the UEFI Windows 10 installation USB from within the BIOS.

At this stage, Windows 10 would still refuse to install to the disk, and so the next steps were mandatory:

I had to return to the first screen of the Windows 10 install and click on the "Repair..." link in order to open up a command terminal:

> diskpart
> list disk
> select disk 0 (my disk was assigned the number 0)
> clean
> convert mbr (THIS IS IMPORTANT!)
> exit
> exit

After rebooting the system, Windows 10 could finally be installed to the NVMe drive. Upon completion, I then returned to the BIOS and set the "PCI ROM Priority" value back to "Legacy ROM" before shutting down the system and reinserting my dedicated GPU.

Was quite the journey but well worth it.

Wow, this thread is still alive ... thanks, Fernando!

I still have my Z77 mobo (GIGABYTE Z77X-UP5) with an i7-3770k at 5GHz. I currently am botting in legacy mode (not UEFI) but the bios does support UEFI. I'd like to add a PCIe NVMe drive and wanted to boot from it. Should the procedure in your first post work fine? If I switch to UEFI boot, what about my current drives? I want to keep my current SATA drives in the system.

@Fernando:
Many thanks. Do you mean the legacy boot option is no longer available in the BIOS? Or do you mean that I will have to switch from UEFI to Legacy in the BIOS in order to boot from the old drive (in legacy)?

In the former case I guess I can still go back by flashing the original BIOS.