AMD GPU BIOS Flash Guide - farhansadik/windows-machine-backup GitHub Wiki

Warning

First, DO NOT FLASH YOUR GPU BIOS, IF YOU'VE NO KNOWLEDGE ABOUT IT.

So there might be some reasons why some want to flash their GPU BIOS, mostly to get one or more of the following:

To get higher Power Limit, Clock Speeds and Voltages
Unlock some GPU Shader Cores.
Currented BIOS or can't recognize its hardware
Failed to install/update driver

DO IT ON YOUR OWN RISK! MIGHT KILL YOUR GPU.

GUI BIOS Flash Method

Extract amdvbflash_win_3.15.zip
Open AMDVBFlashDriverInstaller.exe and enter command i as "Install the AMDVBFlash Driver". After that don not close that window, keep it open.
Then run as admin amdvbflashWin.exe.
Save your current bios before doing anything. If anything bad happens, it might help.
Load your proffered bios image. Take a look at the screenshot below. Make sure VBIOS P/N is matched! otherwise it wont work.

Then click on program.
You're done.

Force Unlock using command line

This is the tutorial that had the CLI forcing the ROM to unlock. You can read the resource links for better understanding.

Run windows terminal/console/command prompt as admin privilege
Redirect to amdflash directory using CD command. Example: CD C:\AMDVBFLASH\AMDVBFLASH3.31
Then type C:\AMDVBFLASH\AMDVBFLASH3.31\amdvbflash -i that will identify the GPU with the number 0 (ZERO), 1 etc should be the only one gpu.
Then type in amdvbflash -unlockrom 0
Then type in amdvbflash -p -fa -fp 0 biosnamefile.rom
And we are done.

Resources