Asus P9D-E/4L - Manual (Page 99)

4-34 Chapter 4: BIOS setup
This option controls if
CSM will be launched.
Launch CSM [Enabled]
Boot Option filter [Legacy only]
Launch PXE OpROM policy [Legacy only]
Launch Storage OpRom policy [Legacy only]
Launch Video OpRom policy [Legacy only]
Other PCI device ROM priority [Legacy OpROM]
Aptio Setup Utility - Copyright (C) 2013 American Megatrends, Inc.
Boot
CSM Parameters
This allows you to set OpROM execution, boot options filter, and other OpROM
settings settings.
Launch CSM [Enabled]
This option allows you to enable or disable the launch of CSM. Configuration options:
[Disabled] [Enabled]
Boot Option filter [Legacy only]
This option allows you to control what devices the system can boot to. Configuration options:
[UEFI and Legacy] [Legacy only] [UEFI only]
Launch PXE OpROM policy [Legacy only]
This option allows you to control the execution of UEFI and Legacy PXE OpROM.
Configuration options: [Do not launch] [UEFI only] [Legacy only] [Legacy first] [UEFI first]
Launch Storage OpROM policy [Legacy only]
This option allows you to control the execution of UEFI and Legacy Storage OpROM.
Configuration options: [Do not launch] [UEFI only] [Legacy only] [Legacy first] [UEFI first]
Launch Video OpROM policy [Legacy only]
This option allows you to control the execution of UEFI and Legacy Storage OpROM.
Configuration options: [Do not launch] [UEFI only] [Legacy only] [Legacy first] [UEFI first]
Other PCI device ROM priority [Legacy OpROM]
This option allows you to control the execution of UEFI and Legacy Storage OpROM.
Configuration options: [UEFI OpROM] [Legacy OpROM]