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

PCIe and Graphics

PCI Express Root Port 10

PCI Express Root Port 10 firmware setup page decoded from AMI HII/IFR resources.

Form ID
0x13ed
Records
34
Path
Setup / Chipset / PCH-IO Configuration / PCI Express Configuration / PCI Express Root Port 10

Record 3582

PCI Express Root Port 10

Firmware Value

Control the PCI Express Root Port.

Opcode
OneOf
Question ID
0xd26
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x108
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Record 3583

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
0xd27
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x370
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Built-in
1SlotStandard default

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}
  • {"condition_id": 1562, "type": "GrayOutIf", "offset": 486790, "expr": ["EqIdVal QuestionId: 0xD34, Value: 0x1"]}

Record 3584

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
0x15e9
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x124
Width
1 byte(s)
Range
0 to 4 step 0
ValueLabelMarkers
0DisabledStandard default
2L1
4Auto

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3585

L1 Substates

Firmware Value

PCI Express L1 Substates settings.

Opcode
OneOf
Question ID
0x1605
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x2c8
Width
1 byte(s)
Range
0 to 2 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1L1.1
2L1.1 & L1.2

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3586

L1 Low

Firmware Value

PCI Express L1 Low Substate Enable/Disable.

Opcode
OneOf
Question ID
0xd28
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x2e4
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3587

ACS

Firmware Value

Enable/Disable Access Control Services Extended Capability

Opcode
OneOf
Question ID
0xd29
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x300
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3588

PTM

Firmware Value

Enable/Disable Precision Time Measurement

Opcode
OneOf
Question ID
0x1621
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x31c
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3589

DPC

Firmware Value

Enable/Disable Downstream Port Containment

Opcode
OneOf
Question ID
0xd2a
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x338
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3590

EDPC

Firmware Value

Enable/Disable Rootport extensions for Downstream Port Containment

Opcode
OneOf
Question ID
0xd2b
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x354
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3591

URR

Firmware Value

PCI Express Unsupported Request Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xd2c
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x140
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3592

FER

Firmware Value

PCI Express Device Fatal Error Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xd2d
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x15c
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3593

NFER

Firmware Value

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

Opcode
OneOf
Question ID
0xd2e
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x178
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3594

CER

Firmware Value

PCI Express Device Correctable Error Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xd2f
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x194
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3595

SEFE

Firmware Value

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

Opcode
OneOf
Question ID
0xd30
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x1e8
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3596

SENFE

Firmware Value

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

Opcode
OneOf
Question ID
0xd31
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x204
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3597

SECE

Firmware Value

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

Opcode
OneOf
Question ID
0xd32
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x220
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3598

PME SCI

Firmware Value

PCI Express PME SCI Enable/Disable.

Opcode
OneOf
Question ID
0xd33
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x23c
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3599

Hot Plug

Firmware Value

PCI Express Hot Plug Enable/Disable.

Opcode
OneOf
Question ID
0xd34
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x258
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}
  • {"condition_id": 1563, "type": "GrayOutIf", "offset": 487342, "expr": ["EqIdVal QuestionId: 0xD27, Value: 0x0"]}

Record 3600

Advanced Error Reporting

Firmware Value

Advanced Error Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xd35
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x274
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3601

PCIe Speed

Firmware Value

Configure PCIe Speed

Opcode
OneOf
Question ID
0xd36
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x290
Width
1 byte(s)
Range
0 to 3 step 0
ValueLabelMarkers
0AutoStandard default
1Gen1
2Gen2
3Gen3

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3602

Transmitter Half Swing

Firmware Value

Transmitter Half Swing Enable/Disable.

Opcode
OneOf
Question ID
0xd37
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x2ac
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3603

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
0xd38
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x395
Width
2 byte(s)
Range
0 to 65535 step 1

Default store records

Store IDStore labelValueOption label
0Standard0

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3604

Extra Bus Reserved

Firmware Value

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

Opcode
Numeric
Question ID
0xd39
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x528
Width
1 byte(s)
Range
0 to 7 step 1

Default store records

Store IDStore labelValueOption label
0Standard0

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3605

Reserved Memory

Firmware Value

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

Opcode
Numeric
Question ID
0xd3a
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x54d
Width
2 byte(s)
Range
1 to 20 step 1

Default store records

Store IDStore labelValueOption label
0Standard10

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3606

Reserved I/O

Firmware Value

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

Opcode
Numeric
Question ID
0xd3b
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x57c
Width
1 byte(s)
Range
4 to 20 step 4

Default store records

Store IDStore labelValueOption label
0Standard4

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3607

LTR

Firmware Value

PCH PCIE Latency Reporting Enable/Disable

Opcode
OneOf
Question ID
0xd3c
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x3ec
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3608

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
0xd3d
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x424
Width
1 byte(s)
Range
0 to 2 step 0
ValueLabelMarkers
0Disabled
1Manual
2AutoStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}
  • {"condition_id": 1564, "type": "SuppressIf", "offset": 487657, "expr": ["EqIdVal QuestionId: 0xD3C, Value: 0x0"]}

Record 3609

Snoop Latency Value

Firmware Value

LTR Snoop Latency value of PCH PCIE

Opcode
Numeric
Question ID
0xd3e
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x49d
Width
2 byte(s)
Range
0 to 1023 step 1

Default store records

Store IDStore labelValueOption label
0Standard60

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}
  • {"condition_id": 1564, "type": "SuppressIf", "offset": 487657, "expr": ["EqIdVal QuestionId: 0xD3C, Value: 0x0"]}
  • {"condition_id": 1565, "type": "SuppressIf", "offset": 487705, "expr": ["EqIdVal QuestionId: 0xD3D, Value: 0x1", "Not"]}

Record 3610

Snoop Latency Multiplier

Firmware Value

LTR Snoop Latency Multiplier of PCH PCIE

Opcode
OneOf
Question ID
0xd3f
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x440
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": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}
  • {"condition_id": 1564, "type": "SuppressIf", "offset": 487657, "expr": ["EqIdVal QuestionId: 0xD3C, Value: 0x0"]}
  • {"condition_id": 1565, "type": "SuppressIf", "offset": 487705, "expr": ["EqIdVal QuestionId: 0xD3D, Value: 0x1", "Not"]}

Record 3611

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
0xd40
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x45c
Width
1 byte(s)
Range
0 to 2 step 0
ValueLabelMarkers
0Disabled
1Manual
2AutoStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}
  • {"condition_id": 1564, "type": "SuppressIf", "offset": 487657, "expr": ["EqIdVal QuestionId: 0xD3C, Value: 0x0"]}

Record 3612

Non Snoop Latency Value

Firmware Value

LTR Non Snoop Latency value of PCH PCIE

Opcode
Numeric
Question ID
0xd41
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x4d5
Width
2 byte(s)
Range
0 to 1023 step 1

Default store records

Store IDStore labelValueOption label
0Standard60

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}
  • {"condition_id": 1564, "type": "SuppressIf", "offset": 487657, "expr": ["EqIdVal QuestionId: 0xD3C, Value: 0x0"]}
  • {"condition_id": 1566, "type": "SuppressIf", "offset": 487849, "expr": ["EqIdVal QuestionId: 0xD40, Value: 0x1", "Not"]}

Record 3613

Non Snoop Latency Multiplier

Firmware Value

LTR Non Snoop Latency Multiplier of PCH PCIE

Opcode
OneOf
Question ID
0xd42
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x478
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": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}
  • {"condition_id": 1564, "type": "SuppressIf", "offset": 487657, "expr": ["EqIdVal QuestionId: 0xD3C, Value: 0x0"]}
  • {"condition_id": 1566, "type": "SuppressIf", "offset": 487849, "expr": ["EqIdVal QuestionId: 0xD40, Value: 0x1", "Not"]}

Record 3614

LTR Lock

Firmware Value

PCIE LTR Configuration Lock

Opcode
OneOf
Question ID
0xd43
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x408
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}

Record 3615

Peer Memory Write Enable

Firmware Value

Peer Memory Write Enable/Disable

Opcode
OneOf
Question ID
0xd44
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0xc7
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]}