Asus H87-PRO User Manual page 97

CSM (Compatibility Support Module)
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 [Enabled]
[Auto]
[Enabled]
[Disabled]
The following four items appear when you set Launch CSM to [Enabled].
3-42
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 Windows
Security Boot.
Boot Devices Control [UEFI and Legacy OpROM]
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 [Legacy OpROM first]
Allows you to select the type of network devices that you want to launch.
Configuration options: [Legacy OpROM first] [UEFI driver first] [Ignore]
Boot from Storage Devices [Legacy OpROM first]
Allows you to select the type of storage devices that you want to launch.
Configuration options: [Both, Legacy OpROM first] [Both, UEFI first]
[Legacy OpROM first] [UEFI driver first] [Ignore]
Boot from PCIe/PCI Expansion Devices [Legacy OpROM first]
Allows you to select the type of PCIe/PCI expansion devices that you want
to launch. Configuration options: [Legacy OpROM first] [UEFI driver first]
UEFI mode.
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Security Update and
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Chapter 3: BIOS setup