the first of those motherboards were produced on 2003/8/7, so it must be newer than that
according to my knowledge there is no option on the bios, try looking on the actual board for a batch number and contact gigabyte. Overall, its a fairly new board. How much is the person your buying it off asking?
Core 2 Duo E6400, DFI Infinity 975X/G, 2x 512mb DDR2 667mhz, Albatron 7900gt, WD 200gb SATA, Samsung DVD-RW, Silverstone ST-50EF 500w PSU.