ASROCK GENOAD8X-2T/BCM User Manual page 94

3.7.1 CSM Parameters
CSM (Compatibility Support Module)
Enable to launch the Compatibility Support Module. If using Windows 8 or later versions
64-bit UEFI and all of the devices support UEFI, it may also disable CSM for faster boot
speed.
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.
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.
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