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Chapter 4: UEFI BIOS
Maximum Read Request
Select Auto for the system BIOS to automatically set the maximum size for a read request
for a PCIe device to enhance system performance. The options are Auto, 128 Bytes, 256
Bytes, 512 Bytes, 1024 Bytes, 2048 Bytes, and 4096 Bytes.
MMCFG Base
This feature determines how the lowest MMCFG (Memory-Mapped Configuration) base is
assigned to onboard PCI devices. The options are 1G, 1.5G, 1.75G. 2G, 2.25G, and 3G.
VGA Priority
Use this feature to select the graphics device to be used as the primary video display for
system boot. The options are Auto, Onboard and Offboard.
PCI Devices Option ROM Setting
Onboard NVME1/NVME2 OPROM
Select EFI to allow the user to boot the computer using an EFI (Extensible Firmware Interface)
device installed on the NVME connector specified by the user. Select Legacy to allow the
user to boot the computer using a legacy device installed on the NVME connector specified
by the user. The options are Disabled, Legacy and EFI.
RSC-G-A66 Upper PCIe 3.0 x16/RSC-G-A66 Lower PCIe 3.0 x16
Select EFI to allow the user to boot the computer using an EFI (Extensible Firmware Interface)
device installed on the PCIe slot specified by the user. Select Legacy to allow the user to
boot the computer using a legacy device installed on the PCIe slot specified by the user. The
options are Disabled, Legacy and EFI. (Note: Riser card names may differ in each system.)
Onboard Video OPROM (Option ROM)
Use this feature to select the Onboard Video Option ROM type. The options are Do Not
Launch, Legacy and UEFI.
Onboard LAN Device
Select Enable to use onboard LAN devices. The options are Disabled, Enabled, and Auto.
Onboard LAN Option ROM Type
Use this feature to select the type of device installed in LAN Port1, which will be used for
system boot. The options are Legacy and EFI.
Onboard LAN1 Option ROM
Use this feature to select the type of device installed in LAN Port1, which will be used for
system boot. The options are PXE, iSCSI and Disabled.
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