Hi Dieter,

I installed it to the Samsung 980 (standard NVME).

@Fernando:
Thank you very much for all your advice.
I managed to add NvmExpressDxe_Small.ffs using UEFI Tool as you showed.

But when I try to flash using Rufus FreeDOS on usb drive and AFUDOS with command: afudos <rom name> /P /N /R
this commands are from manufacturer (Acer) flash.bat that is attached to newer BIOS I downloaded from Acer website.
I get: "3 - Error: ROM file size does not match existing BIOS size."

Modded BIOS and screen attached.

Hi
My problem: Convert .rom to .cap
I've been reading for 2 hours (killmyplz) and I still don't understand "what sticks where" to be able to create a .cap correctly.

BIOS (.cap): mega.nz/file/kxNxFYJD#yLlbA5LeVkYwz5kpBTOpRoFxe7ZpFFKbRducHmPOVoI
BIOS Modified (.rom): mega.nz/file/N8FVkI6a#9iLmAy_LUsty_oowDax2kpUiIK4S7YqaCheMmOfX-54
Motherboard: asus.com/us/Motherboards-Components/Motherboards/All-series/CROSSBLADE_RANGER/HelpDesk_BIOS/

Unintelligible tutorial :(
win-raid.com/t871f50-HowTo-Get-full-NVMe-support-for-all-Systems-with-an-AMI-UEFI-BIOS-393.html#msg122114
Could you create a step-by-step video for this conversion :D

Saludos desde Chile!!
PD1: I love your work
PD2: I recommend uploading only .zip files to the tutorials

The bios mod file is also capsuled, just change the extension to cap.
Open it with UEFItool and ull see.

The post u point is an extraction of the bios from the capsule module, this is an alternative method for further mods in some type of bios, that later will be append back to the original.

@MeatWar:
But... I added the drivers (boot a m2 nvme disk from PCIE) to rom.
Are you sure it's just changing the file extension *.rom to *.cap?

EDIT by Fernando: Unneeded fully quoted post replaced by directly addressing to the author (to save space)

The nvmExpressdxe_4 is present in the bios file.
And no, i didn t said that, i just explained whats was he doing, i dont know wot have u done if it was done correctly by you.
So did u extracted the body using UEFItool? Did u replaced back the mod in the original capsuled file bios?
The guide you need to follows is this, to do the mod NVMe: [HowTo] Get full NVMe support for all Systems with an AMI UEFI BIOS
USE ONLY Asus Bios Flashback, no other method.
Bios name file to use in Flashback feature is CROSBLDR.CAP

EDIT: No, if the mod is done correctly with MMTool 4.50 (Already tested, all OK) the file will stay CAP, not ROM.
There is no tutorial or need of any tool for change ROM to CAP.
The guide linked by me is well understood by all users...NOT ur link, why cant u understand it?

I don't think he understood me. I already did all the steps to add the drivers.
Okay. That is ready ...

Now I have a .rom file.
Asus doesn't accept .rom, only .cap. Ok we all know.

The tutorial (win-raid.com/t871f50-HowTo-Get-full-NVMe-support-for-all-Systems-with-an-AMI-UEFI-BIOS-393.html#msg122114) is not understood.
It does not clearly explain how to change from .rom to .cap?
Any other simpler tutorial? a video? something?

(The name of the file does not matter. It is not the problem.)

@Fernando
@MeatWar

Hello ... a few hours later

New attempt to update the BIOS using the MMTool tutorial.

Software Link MMTool: mega.nz/file/4oMinLZJ#6c7sxz0gDyPqEnAE-J_mMW7RII-2LL5GBcwUGwOnwBU
BIOS NOT modified: mega.nz/file/kxNxFYJD#yLlbA5LeVkYwz5kpBTOpRoFxe7ZpFFKbRducHmPOVoI
BIOS modified (CROSBLDR.CAP): mega.nz/file/ZhFUWDQQ#M2mphpcXwuWSnCssKzouLhJuqEUQLocft6YlnWQaCrw

Image -----> i.ibb.co/WWZD6Km/2.png
Image -----> i.ibb.co/t8ny10c/1.png

Tutorial USB BIOS FlashBack: asus.com/en/support/FAQ/1038568/
Motherboard: asus.com/us/Motherboards-Components/Motherboards/All-series/CROSSBLADE_RANGER/HelpDesk_BIOS/
Pendrive 16 GB in FAT32

Result: Blinks for 5 seconds and the light remains on without blinking.
30 minute wait without changes. The light does not go out.

Image -----> i.ibb.co/gyLrhgm/3.jpg

I restart the computer and it works normally but without the BIOS update.
any ideas?

Yes it happens a lot, try different brand/models of USB drives 2.0, the smallest size, to be certain of witch is working ok, test first with the original unmoded bios file.
If the blinking stops, its not reading/updating.
Its ur first time using Asus Bios flash back feature? Wot is the current bios version on the motherboard? Should be the same as the mod ur trying to flash, not older.

Requirements Tool: Prepare a USB flash drive with a capacity of 1GB or more. *Requires a single sector USB flash drive in FAT16 / 32 format.

Identify the correct USB port (USB3 next to FB button), ive done updates in FAT also not only FAT32, the info is not always accurate from Asus models.

@MeatWar
I re-installed the BIOS and verified that:
The pendrive is working, the USB port is working, the USB BIOS FlashBack application is working - all right.
Latest BIOS available: image -----> i.ibb.co/LR0GyvS/5.png
System BIOS: image -----> i.ibb.co/DwMjW7b/4.jpg

But the update with the method does not work for me: image -----> i.ibb.co/4M2J3c7/6.jpg
Methods:
1) AMI's Aptio UEFI MMTool + "NvmExpressDxe_4" don't work
2) AMI's Aptio UEFI MMTool + "NvmExpressDxe_Small" don't work

First of all... what was ur next action after the update? Config bios and get a new installation of the OS on the NVMe disk?
Do u know how to install the OS correctly in the NVMe disk?
U will not see any NVMe disk in bios...this is a MOD not an oficial solution for old motherboards...u will only see the NVMe on destination disk upon OS setup stage.
IT HAS nothing to do do with regular or small dxe module, the previous mod bios file was OK.

My dear friend, without any reading u cant learn... of course u can t see nothing.
Go read the damm #1 POST...ALL of it.