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Chapter 5: BIOS
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 (SR-IOV) support. SR-IOV is an extension of
the PCI Express interface and consists of two functions: physical functions (PF) and virtual
are Enabled and Disabled.
Maximum Payload
Select Auto for the system BIOS to automatically set the maximum payload value 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.
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.
ASPM Support
Use this item to set the Active State Power Management (ASPM) level for a PCI-E device.
Select Auto for the system BIOS to automatically set the ASPM level based on the system
to L0s state. The options are Disabled, Auto, and Force L0s.
Warning: Enabling ASPM support may cause some PCI-E devices to fail!
ARI Forwarding
Device immediately below the port. The options are Disabled and Enabled.
CPU SLOT7 PCI-E 3.0 X4 OPROM
Disabled, Legacy, and EFI.
M.2 PCI-E 3.0 X2 OPROM
Disabled, Legacy, and EFI.