Some people have PM'd me about the vbios which has apparently vanished from dropbox. Here it is:

https://drive.google.com/file/d/0B8TxUyvOU-ZtVnoxQ0xVWDltMVE/edit?usp=sharing

Included in the zip are 3 files.

• factory_bios.ROM - factory bios for the card when the UEFI switch is not on
• factory_uefi_bios.ROM - factory bios for the card when the UEFI switch IS on (indicated by blue LED on top of the card)
• Sapphire_E24900-O46_AGR.bin - the modified bios.

Use atiflash.exe at the command line (create a usb boot drive to go directly in to DOS, no windows). Personally, I recommend unplugging all of your GPUs except one and flashing the bios like that, one at a time and testing your windows boot up & mining for a few minutes. It's slow but you don't want to get in to a situation where none of your GPUs are working. Factory bios included in case you need to revert.

Some quick atiflash command:

• atiflash -i (information- this will list your GPU(s) and what bios they are using)
• atiflash -ai (advanced information- same as before, but with more info)
• atiflash -f -p # bios_file.bin (this flashes the bios. -f = force overwrite, -p # = specify which GPU by number, bios_file.bin = the bios file (can be .rom or .bin)

Good luck and don't forget to report back here.