Dell XPS 8500 (Early 2012) - Manual (Page 123)

Boot
Numlock Key
Bootup NumLock State — On; Off (On by
default)
Keyboard Errors
Report or Do Not Report (Report by
default)
USB Boot Support
Enabled or Disabled (Enabled by default)
Boot Menu Security
Enabled or Disabled (Disabled by default)
Boot Mode
Legacy or UEFI (Legacy by default)
1st Boot Device
Specifies the boot sequence from the
available devices
USB Floppy Device; Internal HDD
Devices; USB Storage Device; Internal
ODD Devices; Onboard NIC Device;
Disabled (Internal HDD Devices by
default)
2nd Boot Device
Specifies the boot sequence from the
available devices
USB Floppy Device; Internal HDD
Devices; USB Storage Device; Internal
ODD Devices; Onboard NIC Device;
Disabled (USB Storage Device by
default)
3rd Boot Device
Specifies the boot sequence from the
available devices
USB Floppy Device; Internal HDD
Devices; USB Storage Device; Internal
ODD Devices; Onboard NIC Device;
Disabled (Internal ODD Devices by
default)
System Setup Utility 123