Ati Winflash

Flashing your VBIOS

To flash a modified VBIOS you need a tool to actually write the rom to your graphics card. There are commandline tools which you can use while booting a separate boot-disk. I personally use ATIWinFlash as I can flash my cards directly from Windows.

Download Ati winflash


Backups first!

Before you start flashing a new VBIOS, make sure to save a backup of your original rom! In case of a bad flash, or bad settings, you can revert to your original rom.

By using ATIWinFlash, choose the card you want to create a backup for. Then click on the Save/Speichern button to make a backup and save it to a location of your choice.

You can also use the commandline tool to save a rom, by using this command.
AtiFlash.exe -s 0 backup.rom

Where -s 0 means that you save the rom of the graphics card in PCIE slot 0. You can use -s 1, -s 2, -s 3, etc. to choose dofferent cards.


This tool is quite selfexplaining. You have to start atiwinflash.exe tool as administrator, then you choose which graphics card you want to flash, load a rom, and hit PROGRAMM. Your desktop will freeze while the rom is written to the card. After that, you are prompted to restart your machine.

After restarting your card runs with the new VBIOS rom.

You can keep an eye on the CRC checksum in atiwinflash to figure out if a card is running with stock VBIOS or got flashed.


Sometimes you have to use the commandline tool to flash your cards. For example after a bad flash, so your graphicscard is not regocnized in the GUI, or when the GUI does not display all of your cards.

Just open a commandline window inside the ATIFlash folder, or by pressing the Win-key + r, and type cmd to open a terminal.

In the cmd window ise this command to flash your cards with a new VBIOS
AtiFlash.exe -f -p 0 path-to-new-vbios.rom

Where -f means force flash, and -p 0 means flashing the card in PCIE slot 0.
You can use -p 1, -p 2, -p 3, etc. to choose the card you want to flash.


credits: ANORAK.TECH