Using the System Setup Program and UEFI Boot Manager 55Using the System Setup Programand UEFI Boot ManagerThe System Setup program is the BIOS program that enables you to manageyour system hardware and specify BIOS-level options. From the System Setupprogram, you can:• Change the NVRAM settings after you add or remove hardware• View the system hardware configuration• Enable or disable integrated devices• Set performance and power management thresholds• Manage system securityChoosing the System Boot ModeThe System Setup program also enables you to specify the boot mode forinstalling your operating system:• BIOS boot mode (the default) is the standard BIOS-level boot interface.• UEFI boot mode is an enhanced 64-bit boot interface based on UnifiedExtensible Firmware Interface (UEFI) specifications that overlays thesystem BIOS. See "Entering the UEFI Boot Manager" for moreinformation on this interface.You select the boot mode in the Boot Mode field of the Boot Settings screen ofthe System Setup program. See "Boot Settings Screen." Once you specify theboot mode, the system boots in the specified boot mode and you install youroperating system from that mode. Thereafter, you must boot the system tothe same boot mode (BIOS or UEFI) to access the installed operating system.Trying to boot the operating system from the other boot mode will cause thesystem to halt immediately at startup.NOTE: Operating systems must be UEFI-compatible (for example, Microsoft®Windows Server® 2008 x64 version) to be installed from the UEFI boot mode. DOSand 32-bit operating systems do not support UEFI and can only be installed from theBIOS boot mode.
