Leo-Patch 1.6 · Q1HY MoDT · Observations 14 October 2026
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Overview / Manual / PCI Express Root Port 7
PCIe and Graphics
PCI Express Root Port 7
PCI Express Root Port 7 firmware setup page decoded from AMI HII/IFR resources.
Form ID 0x1039
Records 34
Path Setup / Chipset / PCH-IO Configuration / PCI Express Configuration / PCI Express Root Port 7
Record 3480
PCI Express Root Port 7 Firmware Value
Control the PCI Express Root Port.
Opcode OneOf
Question ID 0xcc9
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x105
Width 1 byte(s)
Range 0 to 1 step 0 Permalink
Record 3481
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 0xcca
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x36d
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} {"condition_id": 1544, "type": "GrayOutIf", "offset": 482917, "expr": ["EqIdVal QuestionId: 0xCD7, 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 0x15e6
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x121
Width 1 byte(s)
Range 0 to 4 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
PCI Express L1 Substates settings.
Opcode OneOf
Question ID 0x1602
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2c5
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
PCI Express L1 Low Substate Enable/Disable.
Opcode OneOf
Question ID 0xccb
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2e1
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Enable/Disable Access Control Services Extended Capability
Opcode OneOf
Question ID 0xccc
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2fd
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Enable/Disable Precision Time Measurement
Opcode OneOf
Question ID 0x161e
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x319
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Enable/Disable Downstream Port Containment
Opcode OneOf
Question ID 0xccd
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x335
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Enable/Disable Rootport extensions for Downstream Port Containment
Opcode OneOf
Question ID 0xcce
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x351
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
PCI Express Unsupported Request Reporting Enable/Disable.
Opcode OneOf
Question ID 0xccf
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x13d
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
PCI Express Device Fatal Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xcd0
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x159
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
PCI Express Device Non-Fatal Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xcd1
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x175
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
PCI Express Device Correctable Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xcd2
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x191
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Root PCI Express System Error on Fatal Error Enable/Disable.
Opcode OneOf
Question ID 0xcd3
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x1e5
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Root PCI Express System Error on Non-Fatal Error Enable/Disable.
Opcode OneOf
Question ID 0xcd4
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x201
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Root PCI Express System Error on Correctable Error Enable/Disable.
Opcode OneOf
Question ID 0xcd5
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x21d
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
PCI Express PME SCI Enable/Disable.
Opcode OneOf
Question ID 0xcd6
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x239
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
PCI Express Hot Plug Enable/Disable.
Opcode OneOf
Question ID 0xcd7
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x255
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} {"condition_id": 1545, "type": "GrayOutIf", "offset": 483469, "expr": ["EqIdVal QuestionId: 0xCCA, Value: 0x0"]} Permalink
Record 3498
Advanced Error Reporting Firmware Value
Advanced Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xcd8
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x271
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Configure PCIe Speed
Opcode OneOf
Question ID 0xcd9
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x28d
Width 1 byte(s)
Range 0 to 3 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Record 3500
Transmitter Half Swing Firmware Value
Transmitter Half Swing Enable/Disable.
Opcode OneOf
Question ID 0xcda
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2a9
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Record 3501
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 0xcdb
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x38f
Width 2 byte(s)
Range 0 to 65535 step 1 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Record 3502
Extra Bus Reserved Firmware Value
Extra Bus Reserved (0-7) for bridges behind this Root Bridge.
Opcode Numeric
Question ID 0xcdc
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x525
Width 1 byte(s)
Range 0 to 7 step 1 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Record 3503
Reserved Memory Firmware Value
Reserved Memory for this Root Bridge (1-20) MB
Opcode Numeric
Question ID 0xcdd
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x547
Width 2 byte(s)
Range 1 to 20 step 1 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Reserved I/O (4K/8K/12K/16K/20K) Range for this Root Bridge.
Opcode Numeric
Question ID 0xcde
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x579
Width 1 byte(s)
Range 4 to 20 step 4 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
PCH PCIE Latency Reporting Enable/Disable
Opcode OneOf
Question ID 0xcdf
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x3e9
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Record 3506
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 0xce0
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x421
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} {"condition_id": 1546, "type": "SuppressIf", "offset": 483784, "expr": ["EqIdVal QuestionId: 0xCDF, Value: 0x0"]} Permalink
Record 3507
Snoop Latency Value Firmware Value
LTR Snoop Latency value of PCH PCIE
Opcode Numeric
Question ID 0xce1
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x497
Width 2 byte(s)
Range 0 to 1023 step 1 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} {"condition_id": 1546, "type": "SuppressIf", "offset": 483784, "expr": ["EqIdVal QuestionId: 0xCDF, Value: 0x0"]} {"condition_id": 1547, "type": "SuppressIf", "offset": 483832, "expr": ["EqIdVal QuestionId: 0xCE0, Value: 0x1", "Not"]} Permalink
Record 3508
Snoop Latency Multiplier Firmware Value
LTR Snoop Latency Multiplier of PCH PCIE
Opcode OneOf
Question ID 0xce2
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x43d
Width 1 byte(s)
Range 0 to 5 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} {"condition_id": 1546, "type": "SuppressIf", "offset": 483784, "expr": ["EqIdVal QuestionId: 0xCDF, Value: 0x0"]} {"condition_id": 1547, "type": "SuppressIf", "offset": 483832, "expr": ["EqIdVal QuestionId: 0xCE0, Value: 0x1", "Not"]} Permalink
Record 3509
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 0xce3
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x459
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} {"condition_id": 1546, "type": "SuppressIf", "offset": 483784, "expr": ["EqIdVal QuestionId: 0xCDF, Value: 0x0"]} Permalink
Record 3510
Non Snoop Latency Value Firmware Value
LTR Non Snoop Latency value of PCH PCIE
Opcode Numeric
Question ID 0xce4
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x4cf
Width 2 byte(s)
Range 0 to 1023 step 1 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} {"condition_id": 1546, "type": "SuppressIf", "offset": 483784, "expr": ["EqIdVal QuestionId: 0xCDF, Value: 0x0"]} {"condition_id": 1548, "type": "SuppressIf", "offset": 483976, "expr": ["EqIdVal QuestionId: 0xCE3, Value: 0x1", "Not"]} Permalink
Record 3511
Non Snoop Latency Multiplier Firmware Value
LTR Non Snoop Latency Multiplier of PCH PCIE
Opcode OneOf
Question ID 0xce5
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x475
Width 1 byte(s)
Range 0 to 5 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} {"condition_id": 1546, "type": "SuppressIf", "offset": 483784, "expr": ["EqIdVal QuestionId: 0xCDF, Value: 0x0"]} {"condition_id": 1548, "type": "SuppressIf", "offset": 483976, "expr": ["EqIdVal QuestionId: 0xCE3, Value: 0x1", "Not"]} Permalink
PCIE LTR Configuration Lock
Opcode OneOf
Question ID 0xce6
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x405
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink
Record 3513
Peer Memory Write Enable Firmware Value
Peer Memory Write Enable/Disable
Opcode OneOf
Question ID 0xce7
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0xc4
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1543, "type": "SuppressIf", "offset": 482909, "expr": ["EqIdVal QuestionId: 0xCC9, Value: 0x0"]} Permalink