Leo-Patch 1.6 · Q1HY MoDT · Observations 14 October 2026
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Overview / Manual / PCI Express Root Port 10
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 Permalink
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 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"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 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"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 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"]} Permalink
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 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"]} Permalink
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 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"]} Permalink
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 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"]} Permalink
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 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"]} Permalink
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 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"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1561, "type": "SuppressIf", "offset": 486782, "expr": ["EqIdVal QuestionId: 0xD26, Value: 0x0"]} Permalink