Csm Parameters - ASROCK B550D4-4L User Manual

3.5.1 CSM Parameters

CSM
Enable to launch the Compatibility Support Module. Please do not disable unless
you're running a WHCK test. If you are using Windows Server 2012 R2 or later ver-
sions 64-bit UEFI and all of your devices support UEFI, you may also disable CSM
for faster boot speed.
Launch Other 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.
Launch Video 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.
PCIE4 Slot OpROM
This option controls Legacy/UEFI ROMs priority.
PCIE6 Slot OpROM
This option controls Legacy/UEFI ROMs priority.
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