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
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.