User Manual

4-20
Chapter 4: BIOS setup
PCI Express GEN 2 Settings
Allows you to set up the PCIE Gen 2 congurations.
Completion Timeout [Default]
Allows system to modify the Completion Timeout value for devices that support Completion
Timeout programmablility. Conguration Options: [Disabled] [Default] [Shorter] [Longer]
ARI Forwarding [Disabled]
If your PCIe device supports this function and this item is set to [Enabled], the downstream
port disables its traditional device number eld being 0 enforcement when turing a Type1
conguration request into a Type0 conguration request, permitting access to extended
functions in an ARI device immediately below the port. Conguration Options: [Disabled]
[Enabled]
AtomicOp Requester Enable [Disabled]
If your PCIe device supports this function and this item is set to [Enabled], this function
initiates AtomicOp Requests only if Bus Master Enable bit is in the Command Register Set.
Conguration Options: [Disabled] [Enabled]
Aptio Setup Utility - Copyright (C) 2013 American Megatrends, Inc.
Advanced
PCI Express GEN2 Device Register Settings
Completion Timeout [Default]
ARI Forwarding [Disabled]
AtomicOp Requester Enable [Disabled]
AtomicOp Egress Blocking [Disabled]
IDO Request Enable [Disabled]
IDO Completion Enable [Disabled]
LTR Mechanism Enable [Disabled]
End-End TLP Prex Blocking [Disabled]
PCI Express GEN2 Link Register Settings
Target Link Speed [Auto]
Clock Power Management [Disabled]
Compliance SOS [Disabled]
Hardware Autonomous Width [Enabled]
Hardware Autonomous Speed [Enabled]
In device Functions that
support Completion Timeout
programmablility, allows
system to modify the
Completion Timeout value.
'Default' 50us to 50ms.
If 'Shorter' is selected,
software will use shorter
timeout ranges supported by
hardware. If 'Longer' is
selected, software will use
Link Training Retry [5]
Selects or disables the number of retry attempts that the software will take to retrain the link if
the previous training attempt was unsuccessful. Conguration Options: [Disabled] [2] [3] [5]
Link Training Timeout (us) [1000]
Denes number of Microseconds that the software will wait before polling Link Training bit in
Link Status register. The value ranges from 10 to 10000us.
Unpopulated Links [Keep Link ON]
When this item is set to [Disabled], the software will disable unpopulated PCIe links to save
power. Conguration Options: [Keep Link ON] [Disable Link]
Restore PCIE Registers [Disabled]
On non-PCIe aware operating systems (like Windows Vista), some devices may not be
correctly reinitialized after S3. Enabling this item to restore PCIe device congurations on
S3 resume. Enabling this item may cause problems with other hardware after S3 resume.
Conguration Options: [Enabled] [Disabled]