[Request] Mod Asrock X79 Extreme4 BIOS (NVMe+Above 4G+Resiz.BAR)

BIOS/UEFI Modding BIOS Modding Requests
1

Greetings, experts!
I congratulate everyone on the new year, may it bring you only happiness and positive emotions!

I want to ask you for help, as I am not an expert in the field of bios modification. I want to revitalize my daughter’s computer, and a new card from Intel still looks like the most preferable option. Unfortunately, it requires Above 4G decoding and Resizeable BAR support, which of course is not available on this motherboard. I would be grateful for help in modifying BIOS. I would also like to have NVMe if possible, because right now NVMe is just a data storage and not a system disk, but it’s not a priority.


Edit by Fernando: Thread title shortened

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Greetings @maklayd ,

The latest BIOS for your board appears to have Above 4G Decode.

Is the latest BIOS version being used?

It looks possible to do the mods needed, but there is a risk that something goes wrong and the system becomes unusable.

Are you familiar with flashing BIOS files and using a DOS Command Line?

Best regards

-68k

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Greetings, @68k-dude ,

Thank you for reply.

I’ll double-check again for 4g decode availability.

Yes I have no problem working with the flash utilities from DOS, I also have a ch341a programmer in case of possible problems.

4

That’s great.

As a safety measure, are you able to backup the current flash chip with the CH341A?

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If the menu isn’t hidden, the Above 4G Decode can be found in

Advanced > PCI Subsystem Settings

ASRock_X79_E4_4G
ASRock_X79_E4_4G1622×1081 305 KB

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6

I’ve had a few X79 boards have issues with Above 4G Decode

If you do set it, you may get a failed boot. Clearing CMOS will get it going again.

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this motherboard is kinda tricky, i will try it later when i have free time

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Hi @karfel .

I sent a file yesterday for @maklayd to try.

I hope it works

NVME - added

ReBAR - added

Patches - applied

DSDT modifications - applied. This bit always takes me a while with these X79 boards.

A few hundred errors to fix, but I got there. xCuri0 has great help with the fixes.

We’ll post back here when we know more

Best regards,

-68k

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