**WARNING*** FLASHING BIOS IS AT YOUR OWN RISK, DO NOT TRY TO BACK FLASH TO ON B3 BOARDS WITH EARLIER BIOS THAN THE BOARD WAS SHIPPED WITH

backflashing procedure for all asus p8 series boards with AMI EFI bios

download
http://www.ami.com/support/downloads/amiflash.zip

use the utilities in the aptio folder. i used the x64 win flash cuz im lazy but it works. remember to program all blocks. might get an error verifying the blocks during the last segment, but it will reboot. just re-flash via ez-flash after.

FYI I did brick my board flashing from 1253 to 1305 in EZ FLASH. I do not know if this is a side effect of the previous back flashing so this is all at your own risk (i have a chipmax2 so flashing a bad bios is no prob for me.. board is alive and kicking)