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CSM (Compatibility Support Module)
CSM
Allows you to enable and launch the Compatibility Support Module. Please do not disable
unless you’re running a WHCK test.
Launch PXE OpROM Policy
[UEFI only] Select this item to run those that support UEFI option ROM only.
[Do not launch] Select this item to not execute both legacy and UEFI option ROM.
[Legacy only] Select this item to run those that support Legacy option ROM only.
Launch Storage OpROM Policy
[UEFI only] Select this item to run those that support UEFI option ROM only.
[Do not launch] Select this item to not execute both legacy and UEFI option ROM.
[Legacy only] Select this item to run those that support Legacy option ROM only.
Other PCI Device ROM Priority
Allows you to select whether to enable the UEFI or Legacy option ROM for the PCI device
controller other than the network, mass storage device, and video graphics controllers.
Configuration options: [Do not launch] [UEFI only] [Legacy only]