Two BIOS Chips
Fitting a motherboard with two BIOS circuits has been a normal procedure for some time in some models of motherboard, specially from Gigabyte and Albatron. This feature enables recovering easily a motherboard whose BIOS has been deleted by a virus (like the infamous CIH a.k.a. Chernobyl) or in the event of an unsuccessful BIOS upgrade, seeing that there will be a backup BIOS if the main BIOS is deleted. By the way, we have a full tutorial on how to recover a BIOS deleted by the CIH virus and also a good tutorial on BIOS upgrade.