This boards with AMD 7xx chipsets aren t the best choice for Bulldzoer.
I would advice you ,to have proper BIOS support , to get a AMD 9xx chipset based board.
Maybe the BIOS is not good and does not have the fix for this CPU-s.
You need a BIOS released somewhere in the spring of 2012 to get it done.
Maybe you should contact Gigabyte and ask for a beta BIOS.
Or sell the board you have and get a NEW motherboard