Chapter 4: AMI BIOS
4-13
PCIe/PCI/PnP Configuration
This feature allows the user to set the PCI/PnP configurations for the following items:
Launch Storage OpROM Policy
In case of multiple Option ROMs (Legacy and UEFI-compatible), this feature speci-
fies what ROM to launch. The options are
Legacy Only
and UEFI Only.
PCI Latency Timer
This feature sets the latency Timer of each PCI device installed on a PCI bus. Se-
lect 64 to set the PCI latency to 64 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.
PERR# Generation
Set this item to Enabled to allow PCI devices to generate PERR# error codes. The
options are Enabled and
Disabled
.
SERR# Generation
Set this item to Enabled to allow PCI devices to generate SERR# error codes. The
options are Enabled and
Disabled
.
Maximum Payload
This feature selects the setting for the PCIE maximum payload size. The options
are
Auto,
128 Bytes
,
and 256 Bytes
.
Maximum Read Request
This feature selects the setting for the PCIE maximum Read Request size. The
options are
Auto,
128 Bytes
,
256 Bytes, 512 Bytes, 1024 Bytes, 2048 Bytes, and
4096 Bytes
.
ASPM Support
Set this item to the desired ASPM (Active State Power Management) level. The
options are
Disabled,
Auto and Force L0s.
Above 4G Decoding
Set this item to Enabled to activate 64-bit capable devices to be decoded above
the 4G address space. This works only if the system supports 64-bit PCI decoding.
The options are Enabled and
Disabled
.
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