ASROCK B550 Phantom Gaming 4/ac User Manual page 85

B550 Phantom Gaming 4/ac
CSM (Compatibility Support Module)
CSM
Enable to launch the Compatibility Support Module. Please do not disable unless
you're running a WHCK test.
Above 4G Decoding
Enable or disable 64bit capable Devices to be decoded in Above 4G Address Space
(only if the system supports 64 bit PCI decoding).
Launch PXE OpROM Policy
Select UEFI only to run those that support UEFI option ROM only. Select Legacy
only to run those that support legacy option ROM only. Select Do not launch to not
execute both legacy and UEFI option ROM.
Launch Storage OpROM Policy
Select UEFI only to run those that support UEFI option ROM only. Select Legacy
only to run those that support legacy option ROM only. Select Do not launch to not
execute both legacy and UEFI option ROM.
Bootup Num-Lock
Select whether Num Lock should be turned on or off when the system boots up.
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