Asus RAMPAGE IV BLACK EDITION AC4 RAMPAGE IV BLACK EDITION User's Manual - Page 131

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] The system automatically detects the bootable devices and the addon devices. [Enabled] For better compatibility, enable the CSM to fully support the non-UEFI driver add-on devices or the Windows® UEFI mode. [Disabled] Disable the CSM to fully support the non-UEFI driver add-on devices or the Windows® UEFI mode. The following items appear when you set the Launch CSM to [Enabled]. Boot Device Control [UEFI and L...] 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 OPR...] 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 OPR...] 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 Expansion Devices [Legacy OPR...] Allows you to select the type of PCIe/PCI expansion devices that you want to launch. Configuration options: [Legacy OPROM first] [UEFI driver first] Chapter 3 ASUS RAMPAGE IV BLACK EDITION 3-41