Hi Fernando,

Thank you for your help.
I will do it

@Fernando
Thank you for your help. Attached is the bios.

Short explanation. I flashed the BIOS with the file "bios.rom" in the folder "Modi" using a USB stick.

@Fernando
OK thank you very much. I'll try it again. I still have one question. I flash the bios according to these instructions.
rog.asus.com/forum/showthread.php?99490-Flash-any-most-Asus-motherboard-Bios-in-DOS-with-USB-tutorial-Intel-AMD-roll-back
The Asus tool WINFlash does not allow flashing. (Bios file older than the current Bios version). What other options are there for flashing Asus boards?

@Fernando, @Wishbringer thank you very much!

ASUS H87M-PRO successfully patched.
Flashed via ASUS AI Suite.

BIOS: 2102 dated 2015-03-20
NVMe module: NvmExpressDxe_4.ffs dated 2018-04-18
SSD: A-Data XPG GAMMIX S11 Pro
NVMe-to-PCIe adapter: (asian noname)

hi im having hardtime with a ga-z97x-gaming 5 with adata xpg6000 pro nmve m.2 , tried f6, f7 and f8a.
If i put just this drive, bios founds it udb win10 installs like a charm , BIOS shows in boot options adata and windows boot mgr on adata. it has native speed of 900 mb read and 550 write for a gen2x4 board instead that maximum 2100/1500 per adatas page.
The problem is when i connect the sata ports with to old 1 tb drives, like the nmve disapears and overrides boot , booting from hdd. No sign of nmve , except when i upgrade or downgrade bios.

any clue? is there a modding bios or settings i should try?
thanks.

Bios Boot Manager found another UEFI bootable system entry, the old one from the HHD.
Note: Even after boot in the OLD windows, the NVMe should be visible as storage device.

Settings u can try...not knowing what u settings we can change in this model: Check UEFI/PCIe Disks priority, Possible deletion of old boot volume entry in Boot Manager, not volume itself or done it by software tools around like BCEDIT.
Careful with volumes changes if Important data on it and care for old bootable system disk.

Hi there everybody,
I modded the latest Bios *.CAP file for an ASUS Rampage IV Extreme board (using AMI's MMTool).

One concern though:
I first extracted the body of the *.CAP file, thereby converting it into a *.ROM.
Then I made the modding changes to that *.ROM file and saved the result as a *.ROM.

My question now is, can I flash this *.ROM file directly, or do I have to convert it back to a *.CAP somehow (if so, how)?
Or should I have rather modified the *.CAP directly?

Finally make it work . Settings:
1: Go to -> Peripherals - SATA Configuration
2: Change 'SATA Mode Selection' to RAID. (M.2 PCIe SSD RAID Mode should be 'enabled' by Default, if not enable it)
3: Go to BIOS Features
4: Set Windows 8 Features to:

Windows 8 Features = Windows 8
CSM Support = Always
Boot Mode Selection = UEFI Only
LAN PXE Boot Option ROM = Enabled/Disabled (your choice)
Storage Boot Option Control = UEFI Only
Other PCI Devices ROM Prioity = UEFI OpROM
On boot choos your nmve with windows loader 
​​​​​​​
Save this BIOS configuration.

@wfreetree:
I have followed your instruction (>Link<), I can finish the flash, reboot the computer but it doesn't see the NVMe ssd, any bios setting to change to make it work??

EDIT by Fernando: To save space I have replaced the completely quoted post by the link to it.

Samsung 970evo plus with RIItop pcie adapter card
boot from the sata drive in to os, samsung drive show up
after the modded bios install, I don't see the Samsung drive in Bios

@samana

On some motherboards (do not know yours...) u will not see exact correspondence in description or none at all. Do remember that this is a MOD, not oficial and for old systems...
If u unplug ur old SATA drive, connect only the PCIe Adaptor with the EVO, followed by USB OS installation in UEFI, GPT, on the windows setup drive destination ur NVMe should be there,
in witch later on u can plug in the SATA again. Pay attention to boot manager disk priority if u dont clear the old OS.
The instructions on the 1st post r still valid, regarding secure boot off (Other OS), CSM off (Pure UEFI)