The BIOS is based upon the American Megatrends AMIBIOS that ASUS uses for many of their motherboards. The menu is split into Main, Advanced, Server, and Boot. The Main Menu shows the date, time, Floppy disk installation, and SATA devices installed. The IDE and AHCI configuration screens are also in this menu as well as the System Information screen.

Battery
The Advanced Menu is where the CPU Configuration, the Chipset Configuration, the Legacy Diskette Configuration, the USB Configuration the PCIPnP configuration, the Power On and Event Log configuration, the Hardware Monitor configuration, the PCI Express configuration and the ACPI Configuration screens are located.
The Advanced Chipset configuration screen is where you set your CPU settings, but most server boards will not be overclockable due to the fact that they are designed to last for a long time in a single configuration. The Z8NA-D6C has no frequency overclocks or memory overclocks but does allow you to force memory speeds, and CSI speeds.