Asus M2N-LR/SATA - Manual (Page 84)

ASUS M2N-LR Series -
4.5 Power menu
The Power menu items allow you to change the settings for the ACPI and
Advanced Power Management (APM) features. Select an item then press <Enter>
to display the configuration options.
ACPI APIC Support [Enabled]
ACPI MCFG Support [Enabled]
APM Configuration
Hardware Monitor
Include ACPI APIC
table pointer to RSDT
pointer list.
4.5.2 ACPI MCFG Support [Enabled]
Allows you to enable or disable the Memory Mapped Configuration (MCFG)
support. When set to Enabled, the MCFG table pointer is included in the RSDT
pointer list. Configuration options: [Disabled] [Enabled]
4.5.1 ACPI APIC Support [Enabled]
Allows you to enable or disable the Advanced Configuration and Power Interface
(ACPI) support in the Application-Specific Integrated Circuit (ASIC). When set
to Enabled, the ACPI APIC table pointer is included in the RSDT pointer list.
Configuration options: [Disabled] [Enabled]
Do not change the ACPI APIC support after you have installed the operating
system (OS), otherwise, a boot failure may occur.