D945GCLF Datasheet, PDF (30/84 Pages) Intel Corporation – Technical Product Specification

Intel Desktop Board D945GCLF Technical Product Specification
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 7 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 7. Power States and Targeted System Power
Global
States
Processor
Sleeping States States
Device States
Targeted System
Power ^{(Note 1)}
G0 – working
state
S0 – working
C0 – working D0 – working
state.
Full power > 30 W
G1 – sleeping
state
S1 – Processor
stopped
C1 – stop
grant
G1 – sleeping
state
G1 – sleeping
state
G2/S5
G3 –
mechanical off.
AC power is
disconnected
from the
computer.
S3 – Suspend to
RAM. Context
saved to RAM.
S4 – Suspend to
disk. Context
saved to disk.
S5 – Soft off.
Context not saved.
Cold boot is
required.
No power to the
system.
No power
No power
No power
No power
D1, D2, D3 –
device
specification
specific.
D3 – no power
except for
wake-up logic.
D3 – no power
except for
wake-up logic.
D3 – no power
except for
wake-up logic.
5 W < power < 52.5 W
Power < 5 W ^{(Note 2)}
Power < 5 W ^{(Note 2)}
Power < 5 W ^{(Note 2)}
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.
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