Leo-Patch 1.6 · Q1HY MoDT · Observations 14 October 2026
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Overview / Manual / PCI Express Root Port 6
PCIe and Graphics
PCI Express Root Port 6
PCI Express Root Port 6 firmware setup page decoded from AMI HII/IFR resources.
Form ID 0x1038
Records 34
Path Setup / Chipset / PCH-IO Configuration / PCI Express Configuration / PCI Express Root Port 6
Record 3446
PCI Express Root Port 6 Firmware Value
Control the PCI Express Root Port.
Opcode OneOf
Question ID 0xcaa
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x104
Width 1 byte(s)
Range 0 to 1 step 0 Permalink
Record 3447
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 0xcab
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x36c
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} {"condition_id": 1538, "type": "GrayOutIf", "offset": 481626, "expr": ["EqIdVal QuestionId: 0xCB8, 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 0x15e5
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x120
Width 1 byte(s)
Range 0 to 4 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
PCI Express L1 Substates settings.
Opcode OneOf
Question ID 0x1601
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2c4
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
PCI Express L1 Low Substate Enable/Disable.
Opcode OneOf
Question ID 0xcac
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2e0
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Enable/Disable Access Control Services Extended Capability
Opcode OneOf
Question ID 0xcad
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2fc
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Enable/Disable Precision Time Measurement
Opcode OneOf
Question ID 0x161d
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x318
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Enable/Disable Downstream Port Containment
Opcode OneOf
Question ID 0xcae
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x334
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Enable/Disable Rootport extensions for Downstream Port Containment
Opcode OneOf
Question ID 0xcaf
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x350
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
PCI Express Unsupported Request Reporting Enable/Disable.
Opcode OneOf
Question ID 0xcb0
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x13c
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
PCI Express Device Fatal Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xcb1
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x158
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
PCI Express Device Non-Fatal Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xcb2
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x174
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
PCI Express Device Correctable Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xcb3
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x190
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Root PCI Express System Error on Fatal Error Enable/Disable.
Opcode OneOf
Question ID 0xcb4
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x1e4
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Root PCI Express System Error on Non-Fatal Error Enable/Disable.
Opcode OneOf
Question ID 0xcb5
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x200
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Root PCI Express System Error on Correctable Error Enable/Disable.
Opcode OneOf
Question ID 0xcb6
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x21c
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
PCI Express PME SCI Enable/Disable.
Opcode OneOf
Question ID 0xcb7
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x238
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
PCI Express Hot Plug Enable/Disable.
Opcode OneOf
Question ID 0xcb8
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x254
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} {"condition_id": 1539, "type": "GrayOutIf", "offset": 482178, "expr": ["EqIdVal QuestionId: 0xCAB, Value: 0x0"]} Permalink
Record 3464
Advanced Error Reporting Firmware Value
Advanced Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xcb9
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x270
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Configure PCIe Speed
Opcode OneOf
Question ID 0xcba
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x28c
Width 1 byte(s)
Range 0 to 3 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Record 3466
Transmitter Half Swing Firmware Value
Transmitter Half Swing Enable/Disable.
Opcode OneOf
Question ID 0xcbb
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2a8
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Record 3467
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 0xcbc
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x38d
Width 2 byte(s)
Range 0 to 65535 step 1 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Record 3468
Extra Bus Reserved Firmware Value
Extra Bus Reserved (0-7) for bridges behind this Root Bridge.
Opcode Numeric
Question ID 0xcbd
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x524
Width 1 byte(s)
Range 0 to 7 step 1 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Record 3469
Reserved Memory Firmware Value
Reserved Memory for this Root Bridge (1-20) MB
Opcode Numeric
Question ID 0xcbe
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x545
Width 2 byte(s)
Range 1 to 20 step 1 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Reserved I/O (4K/8K/12K/16K/20K) Range for this Root Bridge.
Opcode Numeric
Question ID 0xcbf
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x578
Width 1 byte(s)
Range 4 to 20 step 4 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
PCH PCIE Latency Reporting Enable/Disable
Opcode OneOf
Question ID 0xcc0
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x3e8
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Record 3472
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 0xcc1
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x420
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} {"condition_id": 1540, "type": "SuppressIf", "offset": 482493, "expr": ["EqIdVal QuestionId: 0xCC0, Value: 0x0"]} Permalink
Record 3473
Snoop Latency Value Firmware Value
LTR Snoop Latency value of PCH PCIE
Opcode Numeric
Question ID 0xcc2
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x495
Width 2 byte(s)
Range 0 to 1023 step 1 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} {"condition_id": 1540, "type": "SuppressIf", "offset": 482493, "expr": ["EqIdVal QuestionId: 0xCC0, Value: 0x0"]} {"condition_id": 1541, "type": "SuppressIf", "offset": 482541, "expr": ["EqIdVal QuestionId: 0xCC1, Value: 0x1", "Not"]} Permalink
Record 3474
Snoop Latency Multiplier Firmware Value
LTR Snoop Latency Multiplier of PCH PCIE
Opcode OneOf
Question ID 0xcc3
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x43c
Width 1 byte(s)
Range 0 to 5 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} {"condition_id": 1540, "type": "SuppressIf", "offset": 482493, "expr": ["EqIdVal QuestionId: 0xCC0, Value: 0x0"]} {"condition_id": 1541, "type": "SuppressIf", "offset": 482541, "expr": ["EqIdVal QuestionId: 0xCC1, Value: 0x1", "Not"]} Permalink
Record 3475
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 0xcc4
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x458
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} {"condition_id": 1540, "type": "SuppressIf", "offset": 482493, "expr": ["EqIdVal QuestionId: 0xCC0, Value: 0x0"]} Permalink
Record 3476
Non Snoop Latency Value Firmware Value
LTR Non Snoop Latency value of PCH PCIE
Opcode Numeric
Question ID 0xcc5
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x4cd
Width 2 byte(s)
Range 0 to 1023 step 1 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} {"condition_id": 1540, "type": "SuppressIf", "offset": 482493, "expr": ["EqIdVal QuestionId: 0xCC0, Value: 0x0"]} {"condition_id": 1542, "type": "SuppressIf", "offset": 482685, "expr": ["EqIdVal QuestionId: 0xCC4, Value: 0x1", "Not"]} Permalink
Record 3477
Non Snoop Latency Multiplier Firmware Value
LTR Non Snoop Latency Multiplier of PCH PCIE
Opcode OneOf
Question ID 0xcc6
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x474
Width 1 byte(s)
Range 0 to 5 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} {"condition_id": 1540, "type": "SuppressIf", "offset": 482493, "expr": ["EqIdVal QuestionId: 0xCC0, Value: 0x0"]} {"condition_id": 1542, "type": "SuppressIf", "offset": 482685, "expr": ["EqIdVal QuestionId: 0xCC4, Value: 0x1", "Not"]} Permalink
PCIE LTR Configuration Lock
Opcode OneOf
Question ID 0xcc7
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x404
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink
Record 3479
Peer Memory Write Enable Firmware Value
Peer Memory Write Enable/Disable
Opcode OneOf
Question ID 0xcc8
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0xc3
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1537, "type": "SuppressIf", "offset": 481618, "expr": ["EqIdVal QuestionId: 0xCAA, Value: 0x0"]} Permalink