Power States And Targeted System Power - Intel BLKD945GCPE - LGA775 1066FSB 2DDR2 2GB Audio Video Lan mATX 10Pack Motherboard Technical Product Specification

Intel Desktop Board D945GCPE Technical Product Specification
1.10.1.1 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 6 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 6. Power States and Targeted System Power
Global States Sleeping States
G0 – working S0 – working
state
G1 – sleeping S1 – Processor
state stopped
G1 – sleeping S3 – Suspend to
state RAM. Context
saved to RAM.
G1 – sleeping S4 – Suspend to
state disk. Context
saved to disk.
G2/S5 S5 – Soft off.
Context not saved.
Cold boot is
required.
G3 – No power to the
mechanical off system.
AC power is
disconnected
from the
computer.
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.
1.10.1.2 ENERGY STAR*
In 2007, the US Department of Energy and the US Environmental Protection Agency
revised the ENERGY STAR* requirements. Intel has worked directly with these two
governmental agencies to define the new requirements. Currently Intel
Boards meet the new requirements.
For information about
ENERGY STAR requirements and recommended configurations
28
Processor
States Device States
C0 – working D0 – working state.
C1 – stop D1, D2, D3 – device
grant specification
specific.
No power D3 – no power
except for wake-up
logic.
No power D3 – no power
except for wake-up
logic.
No power D3 – no power
except for wake-up
logic.
No power D3 – no power for
wake-up logic,
except when
provided by battery
or external source.
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)
Power < 5 W (Note 2)
No power to the system.
Service can be
performed safely.
®
Desktop
Refer to
http://www.intel.com/go/energystar