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

PCIe and Graphics

PCI Express Root Port 17

PCI Express Root Port 17 firmware setup page decoded from AMI HII/IFR resources.

Form ID
0x13f4
Records
34
Path
Setup / Chipset / PCH-IO Configuration / PCI Express Configuration / PCI Express Root Port 17

Record 3820

PCI Express Root Port 17

Firmware Value

Control the PCI Express Root Port.

Opcode
OneOf
Question ID
0xdff
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x10f
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Record 3821

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
0xe00
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x377
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Built-in
1SlotStandard default

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}
  • {"condition_id": 1604, "type": "GrayOutIf", "offset": 495827, "expr": ["EqIdVal QuestionId: 0xE0D, Value: 0x1"]}

Record 3822

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
0x15f0
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x12b
Width
1 byte(s)
Range
0 to 4 step 0
ValueLabelMarkers
0DisabledStandard default
2L1
4Auto

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3823

L1 Substates

Firmware Value

PCI Express L1 Substates settings.

Opcode
OneOf
Question ID
0x160c
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x2cf
Width
1 byte(s)
Range
0 to 2 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1L1.1
2L1.1 & L1.2

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3824

L1 Low

Firmware Value

PCI Express L1 Low Substate Enable/Disable.

Opcode
OneOf
Question ID
0xe01
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x2eb
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3825

ACS

Firmware Value

Enable/Disable Access Control Services Extended Capability

Opcode
OneOf
Question ID
0xe02
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x307
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3826

PTM

Firmware Value

Enable/Disable Precision Time Measurement

Opcode
OneOf
Question ID
0x1628
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x323
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3827

DPC

Firmware Value

Enable/Disable Downstream Port Containment

Opcode
OneOf
Question ID
0xe03
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x33f
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3828

EDPC

Firmware Value

Enable/Disable Rootport extensions for Downstream Port Containment

Opcode
OneOf
Question ID
0xe04
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x35b
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3829

URR

Firmware Value

PCI Express Unsupported Request Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xe05
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x147
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3830

FER

Firmware Value

PCI Express Device Fatal Error Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xe06
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x163
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3831

NFER

Firmware Value

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

Opcode
OneOf
Question ID
0xe07
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x17f
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3832

CER

Firmware Value

PCI Express Device Correctable Error Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xe08
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x19b
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3833

SEFE

Firmware Value

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

Opcode
OneOf
Question ID
0xe09
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x1ef
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3834

SENFE

Firmware Value

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

Opcode
OneOf
Question ID
0xe0a
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x20b
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3835

SECE

Firmware Value

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

Opcode
OneOf
Question ID
0xe0b
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x227
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3836

PME SCI

Firmware Value

PCI Express PME SCI Enable/Disable.

Opcode
OneOf
Question ID
0xe0c
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x243
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3837

Hot Plug

Firmware Value

PCI Express Hot Plug Enable/Disable.

Opcode
OneOf
Question ID
0xe0d
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x25f
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}
  • {"condition_id": 1605, "type": "GrayOutIf", "offset": 496379, "expr": ["EqIdVal QuestionId: 0xE00, Value: 0x0"]}

Record 3838

Advanced Error Reporting

Firmware Value

Advanced Error Reporting Enable/Disable.

Opcode
OneOf
Question ID
0xe0e
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x27b
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3839

PCIe Speed

Firmware Value

Configure PCIe Speed

Opcode
OneOf
Question ID
0xe0f
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x297
Width
1 byte(s)
Range
0 to 3 step 0
ValueLabelMarkers
0AutoStandard default
1Gen1
2Gen2
3Gen3

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3840

Transmitter Half Swing

Firmware Value

Transmitter Half Swing Enable/Disable.

Opcode
OneOf
Question ID
0xe10
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x2b3
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3841

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
0xe11
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x3a3
Width
2 byte(s)
Range
0 to 65535 step 1

Default store records

Store IDStore labelValueOption label
0Standard0

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3842

Extra Bus Reserved

Firmware Value

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

Opcode
Numeric
Question ID
0xe12
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x52f
Width
1 byte(s)
Range
0 to 7 step 1

Default store records

Store IDStore labelValueOption label
0Standard0

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3843

Reserved Memory

Firmware Value

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

Opcode
Numeric
Question ID
0xe13
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x55b
Width
2 byte(s)
Range
1 to 20 step 1

Default store records

Store IDStore labelValueOption label
0Standard10

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3844

Reserved I/O

Firmware Value

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

Opcode
Numeric
Question ID
0xe14
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x583
Width
1 byte(s)
Range
4 to 20 step 4

Default store records

Store IDStore labelValueOption label
0Standard4

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3845

LTR

Firmware Value

PCH PCIE Latency Reporting Enable/Disable

Opcode
OneOf
Question ID
0xe15
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x3f3
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0Disabled
1EnabledStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3846

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
0xe16
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x42b
Width
1 byte(s)
Range
0 to 2 step 0
ValueLabelMarkers
0Disabled
1Manual
2AutoStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}
  • {"condition_id": 1606, "type": "SuppressIf", "offset": 496694, "expr": ["EqIdVal QuestionId: 0xE15, Value: 0x0"]}

Record 3847

Snoop Latency Value

Firmware Value

LTR Snoop Latency value of PCH PCIE

Opcode
Numeric
Question ID
0xe17
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x4ab
Width
2 byte(s)
Range
0 to 1023 step 1

Default store records

Store IDStore labelValueOption label
0Standard60

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}
  • {"condition_id": 1606, "type": "SuppressIf", "offset": 496694, "expr": ["EqIdVal QuestionId: 0xE15, Value: 0x0"]}
  • {"condition_id": 1607, "type": "SuppressIf", "offset": 496742, "expr": ["EqIdVal QuestionId: 0xE16, Value: 0x1", "Not"]}

Record 3848

Snoop Latency Multiplier

Firmware Value

LTR Snoop Latency Multiplier of PCH PCIE

Opcode
OneOf
Question ID
0xe18
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x447
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": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}
  • {"condition_id": 1606, "type": "SuppressIf", "offset": 496694, "expr": ["EqIdVal QuestionId: 0xE15, Value: 0x0"]}
  • {"condition_id": 1607, "type": "SuppressIf", "offset": 496742, "expr": ["EqIdVal QuestionId: 0xE16, Value: 0x1", "Not"]}

Record 3849

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
0xe19
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x463
Width
1 byte(s)
Range
0 to 2 step 0
ValueLabelMarkers
0Disabled
1Manual
2AutoStandard defaultManufacturing default

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}
  • {"condition_id": 1606, "type": "SuppressIf", "offset": 496694, "expr": ["EqIdVal QuestionId: 0xE15, Value: 0x0"]}

Record 3850

Non Snoop Latency Value

Firmware Value

LTR Non Snoop Latency value of PCH PCIE

Opcode
Numeric
Question ID
0xe1a
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x4e3
Width
2 byte(s)
Range
0 to 1023 step 1

Default store records

Store IDStore labelValueOption label
0Standard60

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}
  • {"condition_id": 1606, "type": "SuppressIf", "offset": 496694, "expr": ["EqIdVal QuestionId: 0xE15, Value: 0x0"]}
  • {"condition_id": 1608, "type": "SuppressIf", "offset": 496886, "expr": ["EqIdVal QuestionId: 0xE19, Value: 0x1", "Not"]}

Record 3851

Non Snoop Latency Multiplier

Firmware Value

LTR Non Snoop Latency Multiplier of PCH PCIE

Opcode
OneOf
Question ID
0xe1b
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x47f
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": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}
  • {"condition_id": 1606, "type": "SuppressIf", "offset": 496694, "expr": ["EqIdVal QuestionId: 0xE15, Value: 0x0"]}
  • {"condition_id": 1608, "type": "SuppressIf", "offset": 496886, "expr": ["EqIdVal QuestionId: 0xE19, Value: 0x1", "Not"]}

Record 3852

LTR Lock

Firmware Value

PCIE LTR Configuration Lock

Opcode
OneOf
Question ID
0xe1c
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0x40f
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}

Record 3853

Peer Memory Write Enable

Firmware Value

Peer Memory Write Enable/Disable

Opcode
OneOf
Question ID
0xe1d
VarStore
PchSetup
VarStore GUID
4570B7F1-ADE8-4943-8DC3-406472842384
Offset
0xce
Width
1 byte(s)
Range
0 to 1 step 0
ValueLabelMarkers
0DisabledStandard defaultManufacturing default
1Enabled

Visibility / conditions

  • {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]}