[Request] Full Dump of ASRock B85M Pro3 Rev 1.02 BIOS

BIOS/UEFI Modding BIOS Modding Requests
1

Hello,

I need the original 8MB full BIOS dump for ASRock B85M Pro3 Rev 1.02.
The official website only provides 4MB BIOS files, but the motherboard uses an 8MB (64Mbit) chip.
I already tried programming with the 4MB file (and even hybrid solutions), but the board does not boot correctly.

Could anyone please share the original 8MB dump from a working board?

Thank you very much in advance, and sorry for bothering.

I’ve been struggling with this issue for days.


Edit by Fernando: Thread title shortened and customized

2

What’s the SPI IC id…?

Asrock bios files of this model are full images with all regions:

image
image1015×186 9.28 KB

You can’t program the file as it comes with CAPsule (4100kb), the extracted Intel image is the data to program (4096kb).

1 Like
3

Hi,

My ASRock B85M Pro3 Rev 1.02 board has an 8MB W25Q64 SPI chip installed, but the official ASRock BIOS files are only 4MB.
Do I need to replace the chip with a 4MB SPI flash (like W25Q32) to use the official 4MB BIOS files directly?
Or is there a proper way to adapt the 4MB file to the 8MB chip?

4

Why is that? You believe the IC is not the original one?

As you can, you got 3 WB ids present…

image
image187×119 2.09 KB

That’s all regarding your issue, other than this hw issue or user actions/programming failure.

1 Like
5

Remove the 4096-byte file header

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6

I want to sincerely thank everyone who helped me during the BIOS repair process.
You all took the time to guide me, share your knowledge, and explain each step clearly.

Here’s what we actually did:

  • We downloaded the official BIOS file from ASRock’s website.

  • Then we wrote it directly to the chip using a programmer.

  • Since the original file was smaller than 8 MB, we padded the remaining space to make a full 8 MB image that fits the chip perfectly.