Intel D845GVFN Product Specification - Page 33

System States and Power States

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Product Description Table 11. Effects of Pressing the Power Switch If the system is in this state... Off (ACPI G2/G5 - Soft off) On (ACPI G0 - working state) On (ACPI G0 - working state) Sleep (ACPI G1 - sleeping state) Sleep (ACPI G1 - sleeping state) ...and the power switch is pressed for Less than four seconds Less than four seconds More than four seconds Less than four seconds More than four seconds ...the system enters this state Power-on (ACPI G0 - working state) Soft-off/Standby (ACPI G1 - sleeping state) Fail safe power-off (ACPI G2/G5 - Soft off) Wake-up (ACPI G0 - working state) Power-off (ACPI G2/G5 - Soft off) For information about The desktop boards' compliance level with ACPI Refer to Section 1.5, page 15 1.13.1.1 System States and Power States Under ACPI, the operating system directs all system and device power state transitions. The operating system puts devices in and out of low-power states based on user preferences and knowledge of how devices are being used by applications. Devices that are not being used can be turned off. The operating system uses information from applications and user settings to put the system as a whole into a low-power state. Table 12 lists the power states supported by the Desktop Board D845GVFN along with the associated system power targets. See the ACPI specification for a complete description of the various system and power states. 33

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Product Description
33
Table 11.
Effects of Pressing the Power Switch
If the system is in this state…
…and the power switch is
pressed for
…the system enters this state
Off
(ACPI G2/G5 – Soft off)
Less than four seconds
Power-on
(ACPI G0 – working state)
On
(ACPI G0 – working state)
Less than four seconds
Soft-off/Standby
(ACPI G1 – sleeping state)
On
(ACPI G0 – working state)
More than four seconds
Fail safe power-off
(ACPI G2/G5 – Soft off)
Sleep
(ACPI G1 – sleeping state)
Less than four seconds
Wake-up
(ACPI G0 – working state)
Sleep
(ACPI G1 – sleeping state)
More than four seconds
Power-off
(ACPI G2/G5 – Soft off)
For information about
Refer to
The desktop boards’ compliance level with ACPI
Section 1.5, page 15
1.13.1.1
System States and Power States
Under ACPI, the operating system directs all system and device power state transitions.
The
operating system puts devices in and out of low-power states based on user preferences and
knowledge of how devices are being used by applications.
Devices that are not being used can be
turned off.
The operating system uses information from applications and user settings to put the
system as a whole into a low-power state.
Table 12 lists the power states supported by the Desktop Board D845GVFN along with the
associated system power targets.
See the ACPI specification for a complete description of the
various system and power states.