Intel DH77DF Technical Product Specification - Page 37
System States and Power States - power consumption
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Product Description 1.11.1.1 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 board along with the associated system power targets. See the ACPI specification for a complete description of the various system and power states. Table 12. Power States and Targeted System Power Global States Sleeping States Processor States Device States Targeted System Power (Note 1) G0 - working state G1 - sleeping state S0 - working S3 - Suspend to RAM. Context saved to RAM. C0 - working No power D0 - working state. D3 - no power except for wake-up logic. Full power > 30 W Power < 5 W (Note 2) G1 - sleeping state G2/S5 S4 - Suspend to disk. Context saved to disk. S5 - Soft off. Context not saved. Cold boot is required. No power No power D3 - no power except for wake-up logic. D3 - no power except for wake-up logic. Power < 5 W (Note 2) Power < 5 W (Note 2) G3 - mechanical off AC power is disconnected from the computer. No power to the system. No power D3 - no power for wake-up logic, except when provided by battery or external source. No power to the system. Service can be performed safely. Notes: 1. Total system power is dependent on the system configuration, including add-in boards and peripherals powered by the system chassis' power supply. 2. Dependent on the standby power consumption of wake-up devices used in the system. 37