System Setup→Pci Express Root Port [1-6] - VersaLogic VL-EPU-4011 Reference Manual

System Setup
System Setup→PCI Express Root Port [1-6]
Option: PCI Express Root Port [1-6]
Enable (default)
Auto
Details: Control the PCI Express Root Port.
AUTO: To disable unused root port automatically for the most optimum power
savings.
Enable: Enable PCIe root port
Disable: Disable PCIe root port
Option: ASPM
Disable
L0s (default)
L1
L0sL1
Auto
Details: PCI Express Active State Power Management settings
Option: L1 Substates
Disabled
L1.1
L1.2
L1.1 & L1.2 (default)
Details: PCI Express L1 Substates settings.
Option: ACS
Disabled
Enabled (default)
Details: Enable/Disable Access Control Services Extended Capability
VL-EPU-4011 BIOS Reference Manual 36