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Chapter 6: UEFI BIOS
MMIO High Granularity Size
Use this item to select the high memory size according to memory-address mapping for the
IO hub. The options are 1G, 4G, 16G, 64G, 256G, and 1024G.
PCI PERR/SERR Support
Select Enabled to activate PCI Error and System Error report handling. The options are
Disabled and Enabled.
Maximum Read Request
Select Auto to allow the system BIOS to automatically set the maximum read request size
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
Use this feature to select the default value for the PCI MMIO (Memory-Mapped IO) base
address. The options are 1G, 1.5G, 1.75G, 2G, 2.25G, and 3G.
NVMe Firmware Source
Use this item to select the NVMe firmware to support booting. The options are Vendor
Defined Firmware and AMI Native Support. The default option, Vendor Defined Firmware,
is pre-installed on the drive and may resolve errata or enable innovative functions for the
drive. The other option, AMI Native Support, is offered by the BIOS with a generic method.
VGA Priority
Use this item to select the graphics device to be used as the primary video display for system
boot. The options are Onboard and Offboard.
CPU1 SLOT1 PCI-E 3.0 x8 OPROM, CPU1 SLOT2 PCI-E 3.0 x16 OPROM, CPU1
SLOT3 PCI-E 3.0 x8 OPROM, CPU1 SLOT4 PCI-E 3.0 x16 OPROM, CPU2 SLOT5
PCI-E 3.0 x8 OPROM, CPU2 SLOT6 PCI-E 3.0 x16 OPROM, CPU2 SLOT7 PCI-E 3.0
x8 OPROM, CPU2 SLOT8 PCI-E 3.0 x16 OPROM, CPU2 SLOT9 PCI-E 3.0 x8 OPROM,
CPU2 SLOT10 PCI-E 3.0 x8 OPROM, CPU2 SLOT11 PCI-E 3.0 x4(IN x8) OPROM
Select Disabled to deactivate the selected slot, Legacy to activate the slot in legacy mode,
and EFI to activate the slot in EFI mode. The options are Disabled, Legacy, and EFI.
M.2-P OPROM
The options are Disabled, Legacy, and EFI. Select Disabled to deactivate the M.2 connector,
Legacy to activate the slot in legacy mode, and EFI to activate the slot in EFI mode.
Onboard LAN1 Option ROM, Onboard LAN2 Option ROM
Use the two items to select the type of device installed in a LAN port specified by the user for
system boot. The default setting for Onboard LAN1 Option ROM is Legacy, and the default
setting for Onboard LAN2 Option ROM is Disabled.
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