Leo-Patch 1.6 · Q1HY MoDT · Observations 14 October 2026
System Dark Light
Overview / Manual / PCI Express Root Port 19
PCIe and Graphics
PCI Express Root Port 19
PCI Express Root Port 19 firmware setup page decoded from AMI HII/IFR resources.
Form ID 0x13f6
Records 34
Path Setup / Chipset / PCH-IO Configuration / PCI Express Configuration / PCI Express Root Port 19
Record 3888
PCI Express Root Port 19 Firmware Value
Control the PCI Express Root Port.
Opcode OneOf
Question ID 0xe3d
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x111
Width 1 byte(s)
Range 0 to 1 step 0 Permalink
Record 3889
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 0xe3e
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x379
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} {"condition_id": 1616, "type": "GrayOutIf", "offset": 498409, "expr": ["EqIdVal QuestionId: 0xE4B, 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 0x15f2
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x12d
Width 1 byte(s)
Range 0 to 4 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
PCI Express L1 Substates settings.
Opcode OneOf
Question ID 0x160e
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2d1
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
PCI Express L1 Low Substate Enable/Disable.
Opcode OneOf
Question ID 0xe3f
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2ed
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Enable/Disable Access Control Services Extended Capability
Opcode OneOf
Question ID 0xe40
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x309
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Enable/Disable Precision Time Measurement
Opcode OneOf
Question ID 0x162a
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x325
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Enable/Disable Downstream Port Containment
Opcode OneOf
Question ID 0xe41
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x341
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Enable/Disable Rootport extensions for Downstream Port Containment
Opcode OneOf
Question ID 0xe42
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x35d
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
PCI Express Unsupported Request Reporting Enable/Disable.
Opcode OneOf
Question ID 0xe43
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x149
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
PCI Express Device Fatal Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xe44
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x165
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
PCI Express Device Non-Fatal Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xe45
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x181
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
PCI Express Device Correctable Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xe46
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x19d
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Root PCI Express System Error on Fatal Error Enable/Disable.
Opcode OneOf
Question ID 0xe47
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x1f1
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Root PCI Express System Error on Non-Fatal Error Enable/Disable.
Opcode OneOf
Question ID 0xe48
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x20d
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Root PCI Express System Error on Correctable Error Enable/Disable.
Opcode OneOf
Question ID 0xe49
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x229
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
PCI Express PME SCI Enable/Disable.
Opcode OneOf
Question ID 0xe4a
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x245
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
PCI Express Hot Plug Enable/Disable.
Opcode OneOf
Question ID 0xe4b
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x261
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} {"condition_id": 1617, "type": "GrayOutIf", "offset": 498961, "expr": ["EqIdVal QuestionId: 0xE3E, Value: 0x0"]} Permalink
Record 3906
Advanced Error Reporting Firmware Value
Advanced Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xe4c
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x27d
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Configure PCIe Speed
Opcode OneOf
Question ID 0xe4d
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x299
Width 1 byte(s)
Range 0 to 3 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Record 3908
Transmitter Half Swing Firmware Value
Transmitter Half Swing Enable/Disable.
Opcode OneOf
Question ID 0xe4e
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2b5
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Record 3909
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 0xe4f
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x3a7
Width 2 byte(s)
Range 0 to 65535 step 1 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Record 3910
Extra Bus Reserved Firmware Value
Extra Bus Reserved (0-7) for bridges behind this Root Bridge.
Opcode Numeric
Question ID 0xe50
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x531
Width 1 byte(s)
Range 0 to 7 step 1 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Record 3911
Reserved Memory Firmware Value
Reserved Memory for this Root Bridge (1-20) MB
Opcode Numeric
Question ID 0xe51
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x55f
Width 2 byte(s)
Range 1 to 20 step 1 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Reserved I/O (4K/8K/12K/16K/20K) Range for this Root Bridge.
Opcode Numeric
Question ID 0xe52
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x585
Width 1 byte(s)
Range 4 to 20 step 4 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
PCH PCIE Latency Reporting Enable/Disable
Opcode OneOf
Question ID 0xe53
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x3f5
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Record 3914
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 0xe54
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x42d
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} {"condition_id": 1618, "type": "SuppressIf", "offset": 499276, "expr": ["EqIdVal QuestionId: 0xE53, Value: 0x0"]} Permalink
Record 3915
Snoop Latency Value Firmware Value
LTR Snoop Latency value of PCH PCIE
Opcode Numeric
Question ID 0xe55
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x4af
Width 2 byte(s)
Range 0 to 1023 step 1 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} {"condition_id": 1618, "type": "SuppressIf", "offset": 499276, "expr": ["EqIdVal QuestionId: 0xE53, Value: 0x0"]} {"condition_id": 1619, "type": "SuppressIf", "offset": 499324, "expr": ["EqIdVal QuestionId: 0xE54, Value: 0x1", "Not"]} Permalink
Record 3916
Snoop Latency Multiplier Firmware Value
LTR Snoop Latency Multiplier of PCH PCIE
Opcode OneOf
Question ID 0xe56
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x449
Width 1 byte(s)
Range 0 to 5 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} {"condition_id": 1618, "type": "SuppressIf", "offset": 499276, "expr": ["EqIdVal QuestionId: 0xE53, Value: 0x0"]} {"condition_id": 1619, "type": "SuppressIf", "offset": 499324, "expr": ["EqIdVal QuestionId: 0xE54, Value: 0x1", "Not"]} Permalink
Record 3917
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 0xe57
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x465
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} {"condition_id": 1618, "type": "SuppressIf", "offset": 499276, "expr": ["EqIdVal QuestionId: 0xE53, Value: 0x0"]} Permalink
Record 3918
Non Snoop Latency Value Firmware Value
LTR Non Snoop Latency value of PCH PCIE
Opcode Numeric
Question ID 0xe58
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x4e7
Width 2 byte(s)
Range 0 to 1023 step 1 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} {"condition_id": 1618, "type": "SuppressIf", "offset": 499276, "expr": ["EqIdVal QuestionId: 0xE53, Value: 0x0"]} {"condition_id": 1620, "type": "SuppressIf", "offset": 499468, "expr": ["EqIdVal QuestionId: 0xE57, Value: 0x1", "Not"]} Permalink
Record 3919
Non Snoop Latency Multiplier Firmware Value
LTR Non Snoop Latency Multiplier of PCH PCIE
Opcode OneOf
Question ID 0xe59
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x481
Width 1 byte(s)
Range 0 to 5 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} {"condition_id": 1618, "type": "SuppressIf", "offset": 499276, "expr": ["EqIdVal QuestionId: 0xE53, Value: 0x0"]} {"condition_id": 1620, "type": "SuppressIf", "offset": 499468, "expr": ["EqIdVal QuestionId: 0xE57, Value: 0x1", "Not"]} Permalink
PCIE LTR Configuration Lock
Opcode OneOf
Question ID 0xe5a
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x411
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink
Record 3921
Peer Memory Write Enable Firmware Value
Peer Memory Write Enable/Disable
Opcode OneOf
Question ID 0xe5b
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0xd0
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1615, "type": "SuppressIf", "offset": 498401, "expr": ["EqIdVal QuestionId: 0xE3D, Value: 0x0"]} Permalink