PCIe and Graphics

PCI Express GEN 2 Settings

PCI Express GEN 2 Settings firmware setup page decoded from AMI HII/IFR resources.

Form ID: 0x286f
Records: 13
Parents: PCI Subsystem Settings
Path: Setup / Advanced / PCI Subsystem Settings / PCI Express GEN 2 Settings / Setup / Advanced / Advanced / PCI Subsystem Settings / PCI Express GEN 2 Settings

Record 1687

Completion Timeout

Firmware Value

In device Functions that support Completion Timeout programmability, allows system software to modify the Completion Timeout value.

Firmware help text

In device Functions that support Completion Timeout programmability, allows system software 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 longer timeout ranges.

Form: PCI Express GEN 2 Settings
Opcode: OneOf
Question ID: 0x601
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xced
Width: 1 byte(s)
Range: 0 to 255 step 0

Value	Label	Markers
`255`	Default	Standard defaultManufacturing default
`85`	Shorter
`170`	Longer
`0`	Disabled

Visibility / conditions

{"condition_id": 752, "type": "GrayOutIf", "offset": 389731, "expr": ["EqIdVal QuestionId: 0x1186, Value: 0x1"]}

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Record 1688

ARI Forwarding

Firmware Value

Firmware help text

If supported by hardware and set to 'Enabled', the Downstream Port disables its traditional Device Number field being 0 enforcement when turning a Type1 Configuration Request into a Type0 Configuration Request, permitting access to Extended Functions in an ARI Device immediately below the Port. Default value: Disabled

Form: PCI Express GEN 2 Settings
Opcode: OneOf
Question ID: 0x602
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xcee
Width: 1 byte(s)
Range: 0 to 1 step 0

Value	Label	Markers
`0`	Disabled
`1`	Enabled

Default store records

Store ID	Store label	Value	Option label
`0`	Standard	`0`	Disabled
`1`	Manufacturing	`0`	Disabled

Visibility / conditions

{"condition_id": 753, "type": "GrayOutIf", "offset": 389788, "expr": ["EqIdVal QuestionId: 0x1186, Value: 0x1"]}

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Record 1689

AtomicOp Requester Enable

Firmware Value

If supported by hardware and set to 'Enabled', this function initiates AtomicOp Requests only if Bus Master Enable bit is in the Command Register Set.

Form: PCI Express GEN 2 Settings
Opcode: OneOf
Question ID: 0x603
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xcef
Width: 1 byte(s)
Range: 0 to 1 step 0

Value	Label	Markers
`0`	Disabled
`1`	Enabled

Default store records

Store ID	Store label	Value	Option label
`0`	Standard	`0`	Disabled
`1`	Manufacturing	`0`	Disabled

Visibility / conditions

{"condition_id": 754, "type": "GrayOutIf", "offset": 389843, "expr": ["EqIdVal QuestionId: 0x1186, Value: 0x1"]}

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Record 1690

AtomicOp Egress Blocking

Firmware Value

If supported by hardware and set to 'Enabled', outbound AtomicOp Requests via Egress Ports will be blocked.

Form: PCI Express GEN 2 Settings
Opcode: OneOf
Question ID: 0x604
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xcf0
Width: 1 byte(s)
Range: 0 to 1 step 0

Value	Label	Markers
`0`	Disabled
`1`	Enabled

Default store records

Store ID	Store label	Value	Option label
`0`	Standard	`0`	Disabled
`1`	Manufacturing	`0`	Disabled

Visibility / conditions

{"condition_id": 755, "type": "GrayOutIf", "offset": 389898, "expr": ["EqIdVal QuestionId: 0x1186, Value: 0x1"]}

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Record 1691

IDO Request Enable

Firmware Value

If supported by hardware and set to 'Enabled', this permits setting the number of ID-Based Ordering (IDO) bit (Attribute[2]) requests to be initiated.

Form: PCI Express GEN 2 Settings
Opcode: OneOf
Question ID: 0x605
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xcf1
Width: 1 byte(s)
Range: 0 to 1 step 0

Value	Label	Markers
`0`	Disabled
`1`	Enabled

Default store records

Store ID	Store label	Value	Option label
`0`	Standard	`0`	Disabled
`1`	Manufacturing	`0`	Disabled

Visibility / conditions

{"condition_id": 756, "type": "GrayOutIf", "offset": 389953, "expr": ["EqIdVal QuestionId: 0x1186, Value: 0x1"]}

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Record 1692

IDO Completion Enable

Firmware Value

If supported by hardware and set to 'Enabled', this permits setting the number of ID-Based Ordering (IDO) bit (Attribute[2]) requests to be initiated.

Form: PCI Express GEN 2 Settings
Opcode: OneOf
Question ID: 0x606
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xcf2
Width: 1 byte(s)
Range: 0 to 1 step 0

Value	Label	Markers
`0`	Disabled
`1`	Enabled

Default store records

Store ID	Store label	Value	Option label
`0`	Standard	`0`	Disabled
`1`	Manufacturing	`0`	Disabled

Visibility / conditions

{"condition_id": 757, "type": "GrayOutIf", "offset": 390008, "expr": ["EqIdVal QuestionId: 0x1186, Value: 0x1"]}

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Record 1693

LTR Mechanism Enable

Firmware Value

If supported by hardware and set to 'Enabled', this enables the Latency Tolerance Reporting (LTR) Mechanism.

Form: PCI Express GEN 2 Settings
Opcode: OneOf
Question ID: 0x607
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xcf3
Width: 1 byte(s)
Range: 0 to 1 step 0

Value	Label	Markers
`0`	Disabled
`1`	Enabled

Default store records

Store ID	Store label	Value	Option label
`0`	Standard	`0`	Disabled
`1`	Manufacturing	`0`	Disabled

Visibility / conditions

{"condition_id": 758, "type": "GrayOutIf", "offset": 390063, "expr": ["EqIdVal QuestionId: 0x1186, Value: 0x1"]}

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Record 1694

End-End TLP Prefix Blocking

Firmware Value

If supported by hardware and set to 'Enabled', this function will block forwarding of TLPs containing End-End TLP Prefixes.

Form: PCI Express GEN 2 Settings
Opcode: OneOf
Question ID: 0x608
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xcf4
Width: 1 byte(s)
Range: 0 to 1 step 0

Value	Label	Markers
`0`	Disabled
`1`	Enabled

Default store records

Store ID	Store label	Value	Option label
`0`	Standard	`0`	Disabled
`1`	Manufacturing	`0`	Disabled

Visibility / conditions

{"condition_id": 759, "type": "GrayOutIf", "offset": 390118, "expr": ["EqIdVal QuestionId: 0x1186, Value: 0x1"]}

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Record 1695

Target Link Speed

Firmware Value

If supported by hardware and set to 'Force to X.X GT/s' for Downstream Ports, this sets an upper limit on Link operational speed by restricting the values advertised by the Upstream component in its training sequences.

Firmware help text

Form: PCI Express GEN 2 Settings
Opcode: OneOf
Question ID: 0x609
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xcf5
Width: 1 byte(s)
Range: 1 to 55 step 0

Value	Label	Markers
`55`	Auto	Standard defaultManufacturing default
`1`	Force to 2.5 GT/s
`2`	Force to 5.0 GT/s
`3`	Force to 8.0 GT/s
`4`	Force to 16.0 GT/s
`5`	Force to 32.0 GT/s

Visibility / conditions

{"condition_id": 760, "type": "GrayOutIf", "offset": 390191, "expr": ["EqIdVal QuestionId: 0x1186, Value: 0x1"]}

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Record 1696

Clock Power Management

Observed

If supported by hardware and set to 'Enabled', the device is permitted to use CLKREQ# signal for power management of Link clock in accordance to protocol defined in appropriate form factor specification.

Form: PCI Express GEN 2 Settings
Opcode: OneOf
Question ID: 0x60a
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xcf7
Width: 1 byte(s)
Range: 0 to 1 step 0
Observed value: 0
Observed label: Disabled
Observed date: 2026-10-14T03:10:49.661810+00:00
Observed source: selected-live-settings.json

Value	Label	Markers
`0`	Disabled
`1`	Enabled

Default store records

Store ID	Store label	Value	Option label
`0`	Standard	`0`	Disabled
`1`	Manufacturing	`0`	Disabled

Visibility / conditions

{"condition_id": 761, "type": "GrayOutIf", "offset": 390262, "expr": ["EqIdVal QuestionId: 0x1186, Value: 0x1"]}

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Record 1697

Compliance SOS

Firmware Value

If supported by hardware and set to 'Enabled', this will force LTSSM to send SKP Ordered Sets between sequences when sending Compliance Pattern or Modified Compliance Pattern.

Form: PCI Express GEN 2 Settings
Opcode: OneOf
Question ID: 0x60b
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xcf8
Width: 1 byte(s)
Range: 0 to 1 step 0

Value	Label	Markers
`0`	Disabled
`1`	Enabled

Default store records

Store ID	Store label	Value	Option label
`0`	Standard	`0`	Disabled
`1`	Manufacturing	`0`	Disabled

Visibility / conditions

{"condition_id": 762, "type": "GrayOutIf", "offset": 390317, "expr": ["EqIdVal QuestionId: 0x1186, Value: 0x1"]}

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Record 1698

Hardware Autonomous Width

Firmware Value

If supported by hardware and set to 'Disabled', this will disable the hardware's ability to change link width except width size reduction for the purpose of correcting unstable link operation.

Form: PCI Express GEN 2 Settings
Opcode: OneOf
Question ID: 0x60c
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xcf9
Width: 1 byte(s)
Range: 0 to 1 step 0

Value	Label	Markers
`0`	Enabled
`1`	Disabled

Default store records

Store ID	Store label	Value	Option label
`0`	Standard	`0`	Enabled
`1`	Manufacturing	`0`	Enabled

Visibility / conditions

{"condition_id": 763, "type": "GrayOutIf", "offset": 390372, "expr": ["EqIdVal QuestionId: 0x1186, Value: 0x1"]}

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Record 1699

Hardware Autonomous Speed

Firmware Value

If supported by hardware and set to 'Disabled', this will disable the hardware's ability to change link speed except speed rate reduction for the purpose of correcting unstable link operation.

Form: PCI Express GEN 2 Settings
Opcode: OneOf
Question ID: 0x60d
VarStore: Setup
VarStore GUID: EC87D643-EBA4-4BB5-A1E5-3F3E36B20DA9
Offset: 0xcfa
Width: 1 byte(s)
Range: 0 to 1 step 0

Value	Label	Markers
`0`	Enabled
`1`	Disabled

Default store records

Store ID	Store label	Value	Option label
`0`	Standard	`0`	Enabled
`1`	Manufacturing	`0`	Enabled

Visibility / conditions

{"condition_id": 764, "type": "GrayOutIf", "offset": 390427, "expr": ["EqIdVal QuestionId: 0x1186, Value: 0x1"]}

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