IEI Integration NANO-9453 v1.10 - Manual (Page 155)

NANO-9453 EPIC Motherboard
Page 135
BIOS Menu 8: ACPI Configuration
ACPI Aware O/S [Yes]
Use the ACPI Aware O/S option to enable the system to configure ACPI power saving
options. ACPI can only be implemented if the system OS complies with the ACPI
standard. Windows 98, Windows 2000, and Windows XP all comply with ACPI.
No Disables the ACPI support for the OS. This selection should
be disabled if the OS does not support ACPI
Yes D EFAULT Enables the ACPI support for the operating system. This
selection should be enabled if the OS does support ACPI
6.3.5.1 General ACPI Configuration
Use the General ACPI Configuration menu (BIOS Menu 9) to select the ACPI state when
the system is suspended.