Well I was able to revive the GPU
. To close the loop on this here is what I did:
1. I tried the 1 to 8 pin jump on the bios chip. I wasn't sure if I was supposed to jump the 1 to 8 or 1 to 5 so I tried both multiple times while the GPU was connected with a riser. Each time I would hold the wire in place and turn on the computer. I would then run "amdvbflash -i" from a command prompt but each time the GPU was not found.
2. Not expecting it to work, I plugged the GPU directly into the MB in a PCIE x16 slot and it booted up (which was different because in the past it froze while booting up). I ran GPUZ but it didn't show the GPU. I then opened a cmd window, used "cd" to navigate to the folder that contains the amdvbflash program and again ran "amdvbflash -i"... and to my surprise I saw the GPU. I almost couldn't believe it.
3. Next I flashed the original bios using the "amdvbflash - p" command and it updated successfully. I restarted the computer and the GPU then appeared in GPUZ.
4. I plugged the GPU back into a mining rig on its own and sure enough it started hashing again.
Thanks to everyone for the tips and help on this, it was definitely a learning experience. I have bios modded many cards in the past but this was the first time this happened to me. I am going to leave this card alone and not attempt to mod it again, just happy that it is back to it's original state.
A couple other takeaways:
- It goes without saying to save the original bios before doing any mods, however if you are saving the stock bioses on a Windows machine I would recommend also saving to a memory stick in the event the Windows machine becomes corrupted.
- Use the command line to flash your cards rather than the Windows application as there is less chance of issues occurring.