i9 BIOS
Leo-Patch 1.6 · Q1HY MoDT · Observations 14 October 2026

PCIe and Graphics

PCI Express Root Port 22

PCI Express Root Port 22 firmware setup page decoded from AMI HII/IFR resources.

Form ID
0x157d
Records
34
Path
Setup / Chipset / PCH-IO Configuration / PCI Express Configuration / PCI Express Root Port 22

Record 3990

PCI Express Root Port 22

Firmware Value

Control the PCI Express Root Port.

Opcode
OneOf
Question ID
0xe9a
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x114
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Record 3991

Connection Type

Firmware Value

Built-In: a built-in device is connected to this rootport.

Firmware help text

Built-In: a built-in device is connected to this rootport. SlotImplemented bit will be clear. Slot: this rootport connects to user-accessible slot. SlotImplemented bit will be set.

Opcode
OneOf
Question ID
0xe9b
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x37c
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Built-in
1SlotStandard default

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}
  • {"condition_id": 1634, "type": "GrayOutIf", "offset": 502282, "expr": ["EqIdVal QuestionId: 0xEA8, Value: 0x1"]}

Record 3992

ASPM

Firmware Value

Set the ASPM Level: Force L0s - Force all links to L0s State AUTO - BIOS auto configure DISABLE - Disables ASPM

Firmware help text

Set the ASPM Level: Force L0s - Force all links to L0s State AUTO - BIOS auto configure DISABLE - Disables ASPM

Opcode
OneOf
Question ID
0x15f5
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x130
Width
1 byte(s)
Range
0 to 4 step 0
ValueLabelMarkers
0DisabledStandard default
2L1
4Auto

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 3993

L1 Substates

Firmware Value

PCI Express L1 Substates settings.

Opcode
OneOf
Question ID
0x1611
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x2d4
Width
1 byte(s)
Range
0 to 2 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1L1.1
2L1.1 & L1.2

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 3994

L1 Low

Firmware Value

PCI Express L1 Low Substate Enable/Disable.

Opcode
OneOf
Question ID
0xe9c
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x2f0
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 3995

ACS

Firmware Value

Enable/Disable Access Control Services Extended Capability

Opcode
OneOf
Question ID
0xe9d
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x30c
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 3996

PTM

Firmware Value

Enable/Disable Precision Time Measurement

Opcode
OneOf
Question ID
0x162d
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x328
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 3997

DPC

Firmware Value

Enable/Disable Downstream Port Containment

Opcode
OneOf
Question ID
0xe9e
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x344
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 3998

EDPC

Firmware Value

Enable/Disable Rootport extensions for Downstream Port Containment

Opcode
OneOf
Question ID
0xe9f
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x360
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 3999

URR

Firmware Value

PCI Express Unsupported Request Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xea0
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x14c
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4000

FER

Firmware Value

PCI Express Device Fatal Error Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xea1
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x168
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4001

NFER

Firmware Value

PCI Express Device Non-Fatal Error Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xea2
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x184
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4002

CER

Firmware Value

PCI Express Device Correctable Error Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xea3
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x1a0
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4003

SEFE

Firmware Value

Root PCI Express System Error on Fatal Error Enable/Disable.

Opcode
OneOf
Question ID
0xea4
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x1f4
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4004

SENFE

Firmware Value

Root PCI Express System Error on Non-Fatal Error Enable/Disable.

Opcode
OneOf
Question ID
0xea5
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x210
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4005

SECE

Firmware Value

Root PCI Express System Error on Correctable Error Enable/Disable.

Opcode
OneOf
Question ID
0xea6
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x22c
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4006

PME SCI

Firmware Value

PCI Express PME SCI Enable/Disable.

Opcode
OneOf
Question ID
0xea7
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x248
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4007

Hot Plug

Firmware Value

PCI Express Hot Plug Enable/Disable.

Opcode
OneOf
Question ID
0xea8
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x264
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}
  • {"condition_id": 1635, "type": "GrayOutIf", "offset": 502834, "expr": ["EqIdVal QuestionId: 0xE9B, Value: 0x0"]}

Record 4008

Advanced Error Reporting

Firmware Value

Advanced Error Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xea9
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x280
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4009

PCIe Speed

Firmware Value

Configure PCIe Speed

Opcode
OneOf
Question ID
0xeaa
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x29c
Width
1 byte(s)
Range
0 to 3 step 0
ValueLabelMarkers
0AutoStandard default
1Gen1
2Gen2
3Gen3

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4010

Transmitter Half Swing

Firmware Value

Transmitter Half Swing Enable/Disable.

Opcode
OneOf
Question ID
0xeab
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x2b8
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4011

Detect Timeout

Firmware Value

The number of milliseconds reference code will wait for link to exit Detect state for enabled ports before assuming there is no device and potentially disabling the port.

Opcode
Numeric
Question ID
0xeac
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x3ad
Width
2 byte(s)
Range
0 to 65535 step 1

Default store records

Store IDStore labelValueOption label
0Standard0

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4012

Extra Bus Reserved

Firmware Value

Extra Bus Reserved (0-7) for bridges behind this Root Bridge.

Opcode
Numeric
Question ID
0xead
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x534
Width
1 byte(s)
Range
0 to 7 step 1

Default store records

Store IDStore labelValueOption label
0Standard0

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4013

Reserved Memory

Firmware Value

Reserved Memory for this Root Bridge (1-20) MB

Opcode
Numeric
Question ID
0xeae
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x565
Width
2 byte(s)
Range
1 to 20 step 1

Default store records

Store IDStore labelValueOption label
0Standard10

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4014

Reserved I/O

Firmware Value

Reserved I/O (4K/8K/12K/16K/20K) Range for this Root Bridge.

Opcode
Numeric
Question ID
0xeaf
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x588
Width
1 byte(s)
Range
4 to 20 step 4

Default store records

Store IDStore labelValueOption label
0Standard4

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4015

LTR

Firmware Value

PCH PCIE Latency Reporting Enable/Disable

Opcode
OneOf
Question ID
0xeb0
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x3f8
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4016

Snoop Latency Override

Firmware Value

Snoop Latency Override for PCH PCIE.

Firmware help text

Snoop Latency Override for PCH PCIE. Disabled: Disable override. Manual: Manually enter override values. Auto (default): Maintain default BIOS flow.

Opcode
OneOf
Question ID
0xeb1
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x430
Width
1 byte(s)
Range
0 to 2 step 0
ValueLabelMarkers
0Disabled
1Manual
2AutoStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}
  • {"condition_id": 1636, "type": "SuppressIf", "offset": 503149, "expr": ["EqIdVal QuestionId: 0xEB0, Value: 0x0"]}

Record 4017

Snoop Latency Value

Firmware Value

LTR Snoop Latency value of PCH PCIE

Opcode
Numeric
Question ID
0xeb2
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x4b5
Width
2 byte(s)
Range
0 to 1023 step 1

Default store records

Store IDStore labelValueOption label
0Standard60

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}
  • {"condition_id": 1636, "type": "SuppressIf", "offset": 503149, "expr": ["EqIdVal QuestionId: 0xEB0, Value: 0x0"]}
  • {"condition_id": 1637, "type": "SuppressIf", "offset": 503197, "expr": ["EqIdVal QuestionId: 0xEB1, Value: 0x1", "Not"]}

Record 4018

Snoop Latency Multiplier

Firmware Value

LTR Snoop Latency Multiplier of PCH PCIE

Opcode
OneOf
Question ID
0xeb3
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x44c
Width
1 byte(s)
Range
0 to 5 step 0
ValueLabelMarkers
01 ns
132 ns
21024 nsStandard defaultManufacturing default
332768 ns
41048576 ns
533554432 ns

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}
  • {"condition_id": 1636, "type": "SuppressIf", "offset": 503149, "expr": ["EqIdVal QuestionId: 0xEB0, Value: 0x0"]}
  • {"condition_id": 1637, "type": "SuppressIf", "offset": 503197, "expr": ["EqIdVal QuestionId: 0xEB1, Value: 0x1", "Not"]}

Record 4019

Non Snoop Latency Override

Firmware Value

Non Snoop Latency Override for PCH PCIE.

Firmware help text

Non Snoop Latency Override for PCH PCIE. Disabled: Disable override. Manual: Manually enter override values. Auto (default): Maintain default BIOS flow.

Opcode
OneOf
Question ID
0xeb4
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x468
Width
1 byte(s)
Range
0 to 2 step 0
ValueLabelMarkers
0Disabled
1Manual
2AutoStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}
  • {"condition_id": 1636, "type": "SuppressIf", "offset": 503149, "expr": ["EqIdVal QuestionId: 0xEB0, Value: 0x0"]}

Record 4020

Non Snoop Latency Value

Firmware Value

LTR Non Snoop Latency value of PCH PCIE

Opcode
Numeric
Question ID
0xeb5
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x4ed
Width
2 byte(s)
Range
0 to 1023 step 1

Default store records

Store IDStore labelValueOption label
0Standard60

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}
  • {"condition_id": 1636, "type": "SuppressIf", "offset": 503149, "expr": ["EqIdVal QuestionId: 0xEB0, Value: 0x0"]}
  • {"condition_id": 1638, "type": "SuppressIf", "offset": 503341, "expr": ["EqIdVal QuestionId: 0xEB4, Value: 0x1", "Not"]}

Record 4021

Non Snoop Latency Multiplier

Firmware Value

LTR Non Snoop Latency Multiplier of PCH PCIE

Opcode
OneOf
Question ID
0xeb6
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x484
Width
1 byte(s)
Range
0 to 5 step 0
ValueLabelMarkers
01 ns
132 ns
21024 nsStandard defaultManufacturing default
332768 ns
41048576 ns
533554432 ns

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}
  • {"condition_id": 1636, "type": "SuppressIf", "offset": 503149, "expr": ["EqIdVal QuestionId: 0xEB0, Value: 0x0"]}
  • {"condition_id": 1638, "type": "SuppressIf", "offset": 503341, "expr": ["EqIdVal QuestionId: 0xEB4, Value: 0x1", "Not"]}

Record 4022

LTR Lock

Firmware Value

PCIE LTR Configuration Lock

Opcode
OneOf
Question ID
0xeb7
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x414
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}

Record 4023

Peer Memory Write Enable

Firmware Value

Peer Memory Write Enable/Disable

Opcode
OneOf
Question ID
0xeb8
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0xd3
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]}