Using the System Setup Program and UEFI Boot Manager 61Using the System Setup Programand UEFI Boot ManagerRun the System Setup program to familiarize yourself with your systemconfiguration and to:• Change the NVRAM settings after you add or remove hardware• Set or change user-selectable options• Enable or disable integrated devicesChoosing 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" on page 74 for moreinformation on this interface.You select the boot mode in the Boot Mode field of the "Boot SettingsScreen" on page 68 screen of the System Setup program. Once you specify theboot mode, the system boots in the specified boot mode and you proceedthen to install your operating system from that mode. Thereafter, you mustboot the system to the same boot mode (BIOS or UEFI) to access theinstalled operating system. Trying to boot the operating system from theother boot mode will cause the system 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.
