[OFFER] MAXIMUS VI FORMULA BIOS 1603 modded for NVMe boot drive and EFI updates

Hi again and wait I have to get my hands down first.
Yesterday I succeeded in upgrading My sons Gaming PC asus maximus VI formula with some help from your directions in ths forum…:wink:
Although it was build in 2013 as new it has been upgraded several times. But now it was time trying booting on PCIe 3.0 x 4 (2.nd x16 lane) Nvme ssd installed in Asus Hiper M.2 card V2
With flashback from USB & ROG connect utility I succeeded updating bios to make NVMe M.2 visible in UEFI bios boot manager. Thereafter it succeeded installing iso widows image on M.2 by selecting windows
Boot manager selected boot priority M.2…:wink:
after restart it booted up and off cause needed some updates but that’s just fine. Later in the evening I handed the pc back to my son to test. Wow it is very fast responding and runs approx 6 times faster then before.
Right now I’m just a happy father, that enjoy the big improvement on my sons behalf due to this modded motherboard even 6 time faster then before due to bottleneck in regular SATA SSD’s…:wink:

Many thanks, You are doing a great job here…:wink:

This a very old thread without any input since August 2020 until your new request. This makes it rather unlikely, that you will get a reply.
Tip: You will increase the chances to get a reply from a user, who owns an ASUS Maximus VI Formula and has flashed the modded BIOS, by directly addressing them.
This way these Forium members will get notified about your new request.

@CBangs @Fernando

Q: Will the slot support bifurcation?
A: Z87 chipset will not support bifurcation. You need at least one of the “workstation” motherboards from this era to have a hope of it working.

Enjoy your new speedy BIOS/UEFI!



Hi @Fernando and many thanks to you As well for leading me to the answer of my questions.
And sorry for not following the forum rules due to new in the forum.
As i told @hancar I knew the bios Mod would give approx. 6 x improvement and it really feels great to blow some extra life in a rather old system.
I is like having Porche only using up to 4th. gear and finely jumping to 6th. gear for the first time…:wink:


Hello, resurrecting a post, I have a NOS Maximus VI Formula that I need NVME support for. I tried using the zip file above but once I extract and move it to a USB drive then try to load it an error pops up “Security Verification failed”. What I doing wrong?

I trying to update using the Asus EZ Flash 2 Utility. FYI. Thx !!

Interesting model… does ASUS know that you have a “special” M6F…

Modified bios files will be blocked by security measures, a well know dilema in the mod community, using standard flash methods.

This will NOT happen when using USB BFB feature… so now you know how to proceed.

Guide for ASUS mainboards

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@MeatWar @Biggerguy

Updated & reworked file includes NVMeDxe5.Ffs file as of Dec 9, 2023.
Also ROM EFI network updates.
Updated file found in Post #1
Lastly Post #1 tells you the update method is by Asus Bios Flash Back

Cheers :beers:



Thank you. But my Maximus VI Formula uses the M6F.cap bios. How can I use that .rar file?

That’s because its a compressed file, which you need to decompress.
Try using the program WinRAR to unzip the file.
WinRAR archiver, a powerful tool to process RAR and ZIP files (rarlab.com)
Soon you will get to actually flashing…

Thank you again.

Fernando helped me years ago with installing a modded bios in Maximus IV Extreme and all these years it has worked perfectly.

Now I have this NOS (new old stock) Maximus VI formula and Im lost.

I downloaded the rar file and extracted it.


Are what was extracted.

I am not sure if my board actually has the Flashback utility outside of Windows, because the buttons in back are for CMOS reset and the other is for ROG connect.

Still I unplugged every drive, disabled CSM, inserted my USB drive in the plug directly under the ROG connect button. While the computer was off but plugged in, I pressed the button for a few seconds, released, and it blinked slowly, then more rapidly. Once it stopped and the LED on the USB drive shut off, I rebooted.

After all that I do not see the boot drive in the bios.

Please help.

Read steps 3 and 4… and all Additional Notes from step 3
[HowTo] Get full NVMe Support for all Systems with an AMI UEFI BIOS - Special Topics / NVMe Support for old Systems - Win-Raid Forum (level1techs.com)

Hans buddy… i know what those files are… im also a Mac user :rofl:

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@MeatWar @Biggerguy

Here’s what you should see from the unzipped file:

Standard methods to update bios are found at pages 3-56 to 3-61 of your manual.

See post #13 which outlines the following:

With flashback from USB & ROG connect utility I succeeded updating bios to make NVMe M.2 visible in UEFI bios boot manager. Thereafter it succeeded installing iso widows image on M.2 by selecting windows
Boot manager selected boot priority M.2…:wink:
after restart it booted up and off cause needed some updates but that’s just fine.”

Edit: If you RTFM at page 2-15 you would find the following:

Good luck! :face_with_monocle: :innocent:


Edit #2 Under BOOT TAB Secure Boot setting in your BIOS set the following:
OS Type [Windows UEFI Mode] save & reboot

Recheck that your M.2 drive is correctly mounted & your adapter card is properly seated in the PCIe slot.

Thank you again. I followed all your instructions yet I still do not see the M.2. (or boot drive) I tried inserting the adapter into a different slot and that made no difference. This M.2 and adapter was working and installed in my previous board.

This is what I see:


Next lets ask what M.2 PCIe X4 adapter model you are using & also which M.2 SSD type, model, capacity?


Thank you for the fast reply. Well I believe I discovered the problem.

Using a cable adapter I tried to use the native M.2 adapter with this NVME. It did not work obviously. Apparently that also destroyed the M.2.

I took it out of the adapter and saw this :confused:

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Most likely a dead SSD, so you’ll have to go out an get new one! :disguised_face: :face_with_monocle: :pirate_flag:

Cheers :beers:

Would the M.2 NVME drive work in the M.2 NGFF slot of the mPCIE Module II once the bios is modified? Would it be a good choice if it did? Or stick with using a PCIE adapter card?

I want the best speed and performance but if I am not mistaken using the PCIE card will slow down the lane for my GPU from x16 to x8.

On the other hand, the mPCIE Module shares a SATA connection, such that if one uses an SSD there, you cannot use the #5 SATA connection since it will be disabled.


Above is your mobo PCIe slot diagram. One could run the M.2 through one of the PCIe X1 2.0 slots, but you just cripple the speed.

The logical slot would be PCIe 3.0 x4_3 slot, as one maximizes speed of the boot device, without crippling overall performance.

I’m going to assume you’re not running an Asus NVidia RTX 4090 Gaming OC card with a 42" PG42UQ monitor at native 4K resolution like myself. :sparkler: :fireworks: :partying_face: Running any 1080p or 1440p monitor over a PCIe X8 slot should be plenty with any PCIe NVidia graphics card 3080 & up or AMD 7000 series. Given one can run most of these at 120Hz, 144Hz, 165Hz & 240Hz it will be more than adequate for gaming, video, audio tasks. Even in Hackintosh land you’ll be plenty good for a while.

BTW what is the exact mPCIE Module II adapter gear you are proposing/using?

Cheers :beers:


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Thanks for the response Hans.

My GPU is an RTX 3070.

The mPCIE Module II is one of the OEM components of this board. It supplies Bluetooth connectivity on one side and the other side has a slot designed to fit a 42mm M.2 NGFF.


Given that the board would 1/2 the speed on mPCIe Combo II as it runs on PCIe version 2.0, the PCIe 3.0 slot #6 would be the way to go.

IE get a M.2 NVMe PCIe X4 adapter card as it will run appromimately 3400 MB/s - 3600 MB/s with the modern SSDs.

Cheers :beers:


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