Intel D865GRH D865GRH_TechProdSpec. - Page 49
System States and Power States
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Product Description Table 13 lists the system states based on how long the power switch is pressed, depending on how ACPI is configured with an ACPI-aware operating system. Table 13. Effects of Pressing the Power Switch ...and the power switch is If the system is in this state... pressed for Off (ACPI G2/G5 - Soft off) Less than four seconds On (ACPI G0 - working state) Less than four seconds On (ACPI G0 - working state) More than four seconds Sleep (ACPI G1 - sleeping state) Less than four seconds Sleep (ACPI G1 - sleeping state) 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 1.4, page 17 1.12.1.1 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 14 lists the power states supported by the Desktop Board D865GRH along with the associated system power targets. See the ACPI specification for a complete description of the various system and power states. Table 14. Power States and Targeted System Power Global States Sleeping States Processor States Device States G0 - working state G1 - sleeping state S0 - working S1 - Processor stopped G1 - sleeping state S3 - Suspend to RAM. Context saved to RAM. C0 - working C1 - stop grant No power D0 - working state. D1, D2, D3 - device specification specific. D3 - no power except for wake-up logic. G1 - sleeping state S4 - Suspend to disk. Context saved to disk. No power D3 - no power except for wake-up logic. Targeted System Power (Note 1) Full power > 30 W 5 W < power < 52.5 W Power < 5 W (Note 2) Power < 5 W (Note 2) continued 49