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Chapter 4: AMI BIOS
PCIe/PCI/PnP Configuration
PCI Latency Timer
Use this feature to set the latency Timer of each PCI device installed on a PCI bus.
Select 32 to set the PCI latency to 32 PCI clock cycles. The options are 32 PCI
Bus Clocks, 64 PCI Bus Clocks, 96 PCI Bus Clocks, 128 PCI Bus Clocks, 160 PCI
Bus Clocks, 192 PCI Bus Clocks, 224 PCI Bus Clocks and 248 PCI Bus Clocks.
VGA Palette Snoop
Select Enabled to support VGA palette register snooping which will allow the PCI
cards that do not contain their own VGA color palettes to examine the video cards
palette to mimic it for proper color display. The options are Disabled and Enabled.
PERR# Generation
Select Enabled to allow a PCI device to generate a PERR number for a PCI Bus
Signal Error Event. The options are Disabled and Enabled.
SERR# Generation
Select Enabled to allow a PCI device to generate an SERR number for a PCI Bus
Signal Error Event. The options are Disabled and Enabled.
System Error Logging
If this item is set to enabled, an error log will be created when a system error oc-
curs. 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, 256 Bytes, 512 Bytes, 1024 Bytes, 2048 Bytes, and 4096 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 L0 to force all PCI-E links to operate at L0
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
and Auto.
Warning: Enabling ASPM support may cause some PCI-E devices to fail!
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