Supermicro A3SEV-2C-LN4 User Manual page 67

L1 SubStates
Use this feature to set the PCI Express L1 Substates. The options are Disabled, L1.1,
and L1.1 & L1.2.
PCIe Speed
Use this feature to select the PCI Express port speed. The options are Auto, Gen1,
Gen2, and Gen3.
M.2-H PCI-E 3.0 X2

PCI Express Root Port 4
Use this feature to enable or disable this port. The options are Disabled and Enabled.
ASPM 3
Use this feature to activate the Active State Power Management (ASPM) level for a PCIe
device. Select Auto for the system BIOS to automatically set the ASPM level based on
the system configuration. Select Disabled to disable ASPM support. The options are
Disabled, L0s, L1, L0sL1, and Auto.
L1 SubStates
Use this feature to set the PCI Express L1 Substates. The options are Disabled, L1.1,
and L1.1 & L1.2.
PCIe Speed
Use this feature to select the PCI Express port speed. The options are Auto, Gen1,
Gen2, and Gen3.
CPU SLOT7 PCI-E 3.0 X2 (IN X8)

PCI Express Root Port 7
Use this feature to enable or disable this port. The options are Disabled and Enabled.
ASPM 6
Use this feature to activate the Active State Power Management (ASPM) level for a PCIe
device. Select Auto for the system BIOS to automatically set the ASPM level based on
the system configuration. Select Disabled to disable ASPM support. The options are
Disabled, L0s, L1, L0sL1, and Auto.
L1 SubStates
Use this feature to set the PCI Express L1 Substates. The options are Disabled, L1.1,
and L1.1 & L1.2.
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Chapter 4: BIOS