Asus MBD2738 Manual page 74

CSM (Compatibility Support Module)
This item allows you to configure the CSM (Compatibility Support Module) items to fully
support the various VGA, bootable devices and add-on devices for better compatibility.
Launch CSM
[Auto]
[Enabled]
[Disabled]
The following items appear only when you set the Launch CSM to [Enabled].
Secure Boot
This item allows you to configure the Windows
protect the system from unauthorized access and malwares during POST.
3-20
The system automatically detects the bootable devices and the add-
on devices.
For better compatibility, enable the CSM to fully support the non-UEFI
driver add-on devices or the Windows
Disable the CSM to fully support the non-UEFI driver add-on devices
or the Windows UEFI mode.
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Boot Devices Control
This item allows you to select the type of devices that you want to boot.
Configuration options: [UEFI and Legacy OPROM] [Legacy OPROM only]
[UEFI only]
Boot from Network Devices
This item allows you to select the type of network devices that you want to
launch.
Configuration options: [Ignore] [Legacy only] [UEFI driver first]
Boot from Storage Devices
This item allows you to select the type of storage devices that you want to
launch.
Configuration options: [Ignore] [Legacy only] [UEFI driver first]
Boot from PCI-E Expansion Devices
This item allows you to select the type of PCI-E/PCI expansion devices that
you want to launch.
Configuration options: [Legacy only] [UEFI driver first]
UEFI mode.
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Secure Boot settings and manage its keys to
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Chapter 3: BIOS Setup