Report it to Gigabyte thats all you can do no new BIOS update should need to break something that works.
To help Gigabyte find what the problem is you need to find what could cause it.
Try removing your DVD drive or try it in another SATA port controller.
Try not using the USB 3 ports
Remove your creative xfi champion series or try it in another slot even a x16 slot
Your using 8GB (4x2GB?) in a X58 which is a bit odd so try 6GB in the white slots then try the RAM in:
DDR3_2, DDR3_1, DDR3_4, DDR3_3 Then try DDR3_2, DDR3_1,DDR3_3, DDR3_5.