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Chapter 7: BIOS
PCIe/PCI/PnP Configuration
Launch Storage OpROM Policy
Use this feature to select the Option ROM to boot the system when there are multiple
Option ROMs available in the system. The options are UEFI only and Legacy only.
PCI Latency Timer
Use this feature to set the latency Timer of each PCI device installed on a PCI bus.
Select 64 to set the PCI latency to 64 PCI clock cycles. The options are 32, 64, 96,
128, 160, 192, 224 and 248.
PERR# Generation
Select Enabled to allow a PCI device to generate a PERR number for a PCI Bus
Signal Error Event. The options are Enabled and Disabled.
SERR# Generation
Select Enabled to allow a PCI device to generate an SERR number for a PCI Bus
Signal Error Event. The options are Enabled and Disabled.
Maximum Payload
Select Auto to allow 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 and 256 Bytes.
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.
ASPM Support
This feature allows the user to set the Active State Power Management (ASPM)
level for a PCI-E device. Select Force L0s to force all PCI-E links to operate at L0s
state. Select Auto to allow the system BIOS to automatically set the ASPM level for
the system. Select Disabled to disable ASPM support. The options are Disabled,
Force L0s, and Auto.
Warning: Enabling ASPM support may cause some PCI-E devices to fail!
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.
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