ASUS PRIME Z270-A/AR Series BIOS Manual391.6.2 Platform Misc ConfigurationThe items in this menu allow you to configure the platform-related features.PCIE Express Native Power ManagementThis item allows you to enhance the power saving feature of PCI Express and perform ASPMoperations in the operating system.Configuration options: [Disabled] [Enabled]The following item appears only when you set the PCI Express Native Power Managementto [Enabled].Native ASPM[Enabled] Windows ® Vista OS controls the ASPM (active state powermanagement) support for devices.[Disabled] BIOS controls the ASPM support for the device.PCH - PCI ExpressPCH DMI ASPMThis item allows you to control the Active State Power Management on both NB(NorthBridge) side and SB (SouthBridge) side of the DMI Link.Configuration options: [Disabled] [Enabled]ASPMThis item allows you to select the ASPM state for energy-saving conditions.Configuration options: [Disabled] [L0s] [L1] [L0sL1] [Auto]