ASRock B550 Pro4 User Manual - Page 86

CSM Compatibility Support Module, Above 4G Decoding, Launch PXE OpROM Policy, Bootup Num-Lock

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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. 80 English

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English
80
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.