Hey, not sure if you still need the bios but here it is https://www.techpowerup.com/vgabios/186272/gigabyte-gtx1080-8192-160609-2. This is the stock bios I just uploaded using GPU-Z (you can also use this to make backups). Extract the nvflash files (2 files) from here http://filehorst.de/d/bAurGoxG and ignore the roms as they are for the Asus 1080. The NVflash from the official site did not work me but this version did. Just follow the guide here http://www.overclock.net/t/1523391/easy-nvflash-guide-with-pictures-for-gtx-970-980 to restore bios.