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Chapter 6: BIOS
73
PCI Devices Common Settings
Above 4G Decoding
This setting enables or disables 64-bit capable devices ability to be decoded in above 4G
address space (only if the system supports 64-bit PCI decoding). The options are Disabled
and
Enabled
.
SR-I0V Support
If the system has SR-IOV capable PCI-E devices, this setting will enable or disable the Single
Root IO Virtualization Support for the system. The options are
Disabled
and Enabled.
BME DMA Mitigation
Use this setting to re-enable the Bus Master Attribute that was disabled during PCI enumeration
for PCI bridges after SMM is locked. The options are
Disabled
and Enabled.
ARI Forwarding
If supported by the hardware and set to 'enabled', the downstream port disables its traditional
device number field, being 0 enforcement, when turning a type1 configuration request into
a type0 configuration request. This permits access to extended functions in an ARI device
immediately below the port. The options are
Disabled
and Enabled.
PCIe Spread Spectrum
Use this setting to enable or disable PCI-E Spread Spectrum for your system.The options
are
Disabled
and Enabled.
Target Link Speed
If supported by hardware and set to Force to x.S GT/S (x being a value of 2.5, 5.0 or 8.0) for
Downstream Ports, this sets an upper limit on Link Operational Speed by restricting the values
advertised by the UPstream component in its training sequences. When
Auto
is selected,
the HW initialized data will be used. The options are
Auto
, Force to 2.5 GT/s, Force to 5.0
GT/s, Force to 8.0 and Force to 16.0 GT/s.
VGA Priority
Use this setting to select between onboard or offboard VGA support. The options are
Onboard
and Offboard.
NVMe Firmware Source
Use this setting to select between the AMI Native firmware support or the device vendor-
defined firmware support. The options are
Vendor Defined Firmware
and AMI Native Support.
M.2(AHCI) Firmware Source
Use this setting to select between the AMI Native firmware support or the device vendor-
defined firmware support. The options are
Vendor Defined Firmware
and AMI Native Support.