MSI BIOS Power Management: Understanding ACPI Settings S1 and S3

▍BIOS Setup

Power Management Setup

Important

S3-related functions described in this section are available only when the BIOS sup- ports S3 sleep mode.

▶ACPI Function

This item is to activate the ACPI (Advanced Configuration and Power Management Interface) Function. If your operating system is ACPI-aware, such as Windows 98SE/ 2000/ ME/ XP, select [Enabled].

▶ACPI Standby State

This item specifies the power saving modes for ACPI function. If your operating system supports ACPI, such as Windows 2000/ XP, you can choose to enter the Standby mode in S1(POS) or S3(STR) fashion through the setting of this field. Settings are:

[S1]	The S1 sleep mode is a low power state. In this state, no system
	context is lost (CPU or chipset) and hardware maintains all sys-
	tem’s context.
[S3]	The S3 sleep mode is a lower power state where the in formation of
	system configuration and open applications/files is saved to main

memory that remains powered while most other hardware compo- nents turn off to save energy. The information stored in memory will be used to restore the system when a “wake up” event occurs.

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