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Chapter 4: UEFI BIOS
PCIe/PCI/PnP Configuration
The following PCI information will be displayed:
•
PCI Bus Driver Version
PCI Devices Common Settings
Above 4G Decoding (Available if the system supports 64-bit PCI decoding)
Select Enabled to decode a PCI device that supports 64-bit in the space above 4G Address.
The options are Enabled and Disabled.
SR-IOV Support (Available if the system supports Single-Root Virtualization)
Select Enabled for Single-Root IO Virtualization support. The options are Enabled and
Disabled.
MMIO High Base
Use this feature to select the base memory size according to memory-address mapping for
the IO hub. The options are 56T, 40T, 24T, 16T, 4T, and 1T.
MMIO High Granularity Size
Use this feature 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.
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 Settings
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.
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