Chapter 6: UEFI BIOS
105
Maximum Read Request
Select Auto for the system BIOS to automatically set the maximum size for a read request
for a PCI-E 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.
NVMe Firmware Source
This feature determines which type of the NVMe firmware should be used in your system.
The options are
Vendor Defined Firmware
and AMI Native Support.
VGA Priority
Use this feature to select the graphics device to be used as the primary video display for
system boot. The options are
Onboard
and Offboard.
CPU1 AIOM PCI-E X16 OPROM/ CPU1 SLOT9 PCI-E 3.0 X16 OPROM/ CPU1 SLOT6
PCI-E 3.0 X8 OPROM/ CPU2 SLOT5 PCI-E 3.0 X16 OPROM/ M.2-H_1 OPROM/ M.2-H_2
OPROM
Select EFI to allow the user to boot the computer using an EFI (Extensible Firmware Interface)
device installed on the PCI-E slot specified by the user. Select Legacy to allow the user to
boot the computer using a legacy device installed on the PCI-E slot specified by the user. The
options are Disabled,
Legacy,
and EFI. (
Note:
Riser card names may differ in each system.).
Bus Master Enable
If this setting is set to Enabled, the PCI Bus Driver will enable the Bus Master Attribute for
DMA transactions. If this setting is set to Disabled, the PCI Bus Driver will disable the Bus
Master Attribute for Pre-Boot DMA protection. The options are
Enabled
and Disabled.
Onboard LAN1 Option ROM (for X11DPD-M25 only)
Use this feature to select the onboard Ethernet controller port 1 option ROM execution. The
options are Disabled,
Legacy
, and EFI.
Onboard LAN2 Option ROM (for X11DPD-M25 only)
Use this feature to select the onboard Ethernet controller port 2 option ROM execution. The
options are
Disabled
, Legacy, and EFI.
Onboard NVMe#1 Option ROM ~ Onboard NVMe#4 Option ROM
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
.