Leo-Patch 1.6 · Q1HY MoDT · Observations 14 October 2026
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Overview / Manual / PCI Express Root Port 17
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 Permalink
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 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"]} 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 0x15f0
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x12b
Width 1 byte(s)
Range 0 to 4 step 0 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 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"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 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"]} Permalink
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 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"]} Permalink
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 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"]} Permalink
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 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"]} Permalink
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 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"]} Permalink
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 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"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink
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 Visibility / conditions {"condition_id": 1603, "type": "SuppressIf", "offset": 495819, "expr": ["EqIdVal QuestionId: 0xDFF, Value: 0x0"]} Permalink