You have q flash in your board.
1. Download the bios from Gigabyte website and copy it to a freshly formatted (FAT32) flash drive
2. Reboot and at the boot screen press the END key to enter Q flash
3. Save your current bios and only then update with new one.
DO NOT STOP AT THE MIDDLE OF THE UPDATE PROCESS. MAKE SURE YOUR PC DOES NOT TURN OFF DURING THAT PROCESS.
It only takes some seconds.