Power States And Targeted System Power - Intel BLKDP965LTCK - Conroe LGA775 1066 800FSB DDR2 Audio Lan SATA ATX 10Pack Motherboard 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 8 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 8. Power States and Targeted System Power
Global
States Sleeping States
G0 – working S0 – working
state
G1 – sleeping N/A
state
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 Two-Watt Standby
In 2001, the U.S. government issued an executive order requiring a reduction in
power for appliances and personal computers. This board meets that requirement by
operating at 1.5 W (or less) in S5 (Standby) mode. Two-Watt operation applies only
to the S5 state when the computer is turned off, but still connected to AC power.
Two-Watt operation does not apply to the S3 (Suspend to RAM) or S4 (Suspend to
disk) states.
Processor
States Device States
C0 – working D0 – working
state.
C1 – stop D1, D2, D3 –
grant device
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.
Product Description
Targeted System
Power (Note 1)
Full power > 30 W
5 W < power < 52.5 W
(Note 2)
Power < 5 W
(Note 2)
Power < 5 W
(Note 2)
Power < 5 W
No power to the system.
Service can be performed
safely.
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