Well, I believe it will just work for you ... but it's your risk so ...
If you want to be really certain you won't brick it, you need to buy a USB CH341A plus SOIC clip, and you need to practice clipping on to the VBIOS flash chip and reading from it, and really, to be sure, writing back to it what you read from it; i.e. practice removing the graphics card and then reading/writing to its flash using a clip and another computer.
Then you will have a backup and you can basically be sure that you have the technology to restore it to its previous state if needed.
But given the other success stories above, the updated VBIOS should just work...