Hi!
I have on SSD M2 Samsung 970 evo 500GB in to the pcie adapter.
I try to search the row code to insert the "NvmExpressDxe Small.ffs" in AMI UEFI BIOS but I don't find. :(
I see only the: Pci Bus, Pci Root Bridge, Asus Rt Pci.
You are some suggestion for this?

Best regardts!

I insert in bios utility after the DXE Driver but in bios menu after flashback the new menu is: PATA SN: :(
Wont reconize my M2 NVMe.
Hardvare config ASUS M5A99X EVO R2.0, AMD FX 8150, memory 16GB/1600 Corsaire Veganance, VGA ASUS Strix9380.
The pcie adapter with M2 I insert in2,0x16 slot
I sending a couple picture with the bios utility.

@Fernando ,
I joined to say thank you. Your guide is clear, concise, simple to follow, up to date and all the links work!!! Very nice!
I got an M.2 NVMe 970 EVO to use on my Asus Z87 Sabertooth with a generic adapter card and followed your guide. Worked as described. I then had a "PATA SS" available for selection in the boot menu. I cloned my SATA SSD boot drive (Win10 Pro x64, MBR) to the 970 EVO NVMe, but when I select it, it won't boot; just a few curser blinks on the screen and then nothing. I think this is similar to what @sxott described and tried to resolve.

I know your guide recommends installing a fresh copy of Win10, but I would really like to keep my current install if at all possible.
Do you or anyone else know how I could "fix" my cloned NVMe drive boot issue?
Thanks!

@PeterWT:
I got past that to a blue screen crash. Just make sure your old ssd is not in pc.

You have to convert the MBR to GPT for sure. That is a feature of windows do it to the NVMe leave the source drive alone in case you bollox it up.
https://technet.microsoft.com/en-us/windows/mt782786.aspx
That probably says how, but I haven't watched it. It is quite straightforward. Just get a bootable windows 10 media go to the command prompt and convert the NVMe drive to GPT. Restart.
That gave a blue screen after it tried booting, but I stopped there.

The next step that I think would work is to do the following. Boot onto you recovery media again, go to command prompt. Do a diskpart list volume command to see the volumes. If they are all labeled great. Browse for the boot folder dir/a to list the hidden folders etc.. Once you find boot and BCD keep track of where they are. Generally you can see them in the list volume command as they are smallish volumes. This guide looks good.

This is not the link I found but it is close and likely will work and has a similar set of commands.
http://woshub.com/how-to-repair-uefi-boo...r-in-windows-8/
You can create the boot loader from scratch so I don't see why this would not work, like I said I messed up Ssd boot partition and found all this to recover that successfully. I think the odds are good you can do it. Let us know.

I used a combination of pages some of which I remember, but that page looks pretty good to start.

Hi! Fernando

I send few picture from utilities window, If you don't disturb, you get know a little help me, please.
It's possible to modify the bios for M2 NVMe or not?

TXU!
Best regards!
L. Mihály

EDIT by Fernando: Absolutely unneeded attached pictures removed

@Fernando ,
1. is it possible to use the UEFITool_NE*?
2. What is the difference between the proposed NvmExpressDxe_4-module and Asus X99-E-10G WS** BIOS v1002*** NVMe modules****? In particular, when modifying Asus P8Z77 WS's BIOS.

* https://github.com/LongSoft/UEFITool
** https://www.asus.com/us/Motherboards/X99-E-10G-WS/
*** https://dlcdnets.asus.com/pub/ASUS/mb/So...S-ASUS-1002.zip
**** https://www.dropbox.com/sh/nvttmekthp7wr...bStFp09bECgEupa

NE/Alpha cannot edit, only use to view/debug/in-conjunction with standard UEFITool while correcting things etc.

Sometimes UEFITool 25.1 removes padding, sometimes it's the padding mentioned at the parser section, sometimes not, so watch this and compare parser before/after and observe if padding files near where you edit are same as before too.
If they change, and you loose any padding files, you will need to use 25.0

Hi Fernandao!

Sorry, I forgot the most importánt thing, the question.

In my BIOS I don't see the "Pcie Lane DXE" or something similar with this.

Honestly, I don't know which under DXE insert the subroutine file.
I do not know which is the one is the same or equivalent with PCIeLDXE in my BIOS

That is the reason whay I send the pictures.

You know a little bit help me?

THXU!
Best Regads!

Thanks to accept me in this forum
Can you check my uploaded bios with my asus p8z77 v pro @Fernando
https://www.mediafire.com/file/kur7m3s8f...-V-PRO.rar/file

Thanks for your help

Hello y'all!
I have added NvmExpressDxe_4.ffs to an Image of Bios version 4901 for P9X79-WS MB.
After Flashing (using Bios Flashback Method), MB starts up, while POST I get the message: Searching for ATAPI Devices.
Since no other Storage Medium oder Drive is attached at this time, this message relates to the attached SSD (970 Evo).
This Setup is currently for testing.

In Setup I can identify the SSD, as it is the only entry in the boot devices section. It is identified as "PATA SS".
If I don't interrupt POST, the system tries to boot from the SSD.
Anyway, there is no OS present on it, so therefore there's nothing to boot, but the System behaves like with any other legitimate Drive or volume which has no OS.
That all seems okay, but my first question is: Is this the way the SSD should be recognized by the BIOS? As some sort of PATA/ATAPI Device?
Does this have any negative effect on the performance of the SSD, or is it just a case of bad labeling and can be ignored?

By the way, I can post the modded image in the offers section, if it is wanted.
This Bios Image is the latest version 4901 from august 2018, which ASUS released to incorporate the latest microcode updates (Spectre and Meltdown Fixes).