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Chapter 6: BIOS
SR-IOV Support (Available if the system supports Single-Root Virtualization)
Select Enabled for Single-Root IO Virtualization support. The options are Disabled and
Enabled.
MMIO High Base
Use this item to select the base memory size according to memory-address mapping for the
IO hub. The base memory size must be between 4032G to 4078G. The options are 56T,
40T, 24T, 16T, 4T, and 1T.
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
Use this feature to enable or disable the runtime event for SERR (System Error)/ PERR (PCI/
PCI-E Parity Error). The options are Disabled and Enabled.
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 the lowest MMCFG (Memory-Mapped Configuration) base assigned
to PCI devices. The options are 1G, 1.5G, 1.75G. 2G, 2.25G, and 3G.
NVMe Firmware Source
This feature determines the lowest MMCFG (Memory-Mapped Configuration) base assigned
to PCI devices. The options are Vendor Defined Firmware and AMI Native Support.
VGA Priority
Use this item to select the graphics device to be used as the primary video display for system
boot. The options are Auto, Onboard and Offboard.
AOC-URN4-m2TS PCI-E 3.0 X16 OPROM
RSC-UN4-88 SLOT1 PCI-E X8 OPROM
RSC-UN4-88 SLOT2 PCI-E X8 OPROM
RSC-UMR-8 SLOT1 PCI-E 3.0 X8 OPROM
RSC-UMR-8 M.2 PCIe X8 OPROM
For the five settings above, select Disabled to deactivate the selected slots, Legacy to activate
the slot in legacy mode, and EFI to activate the slot in EFI (Expansible Firmware Interface)
mode. The options are Disabled, Legacy, and EFI.
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