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30 Intel Server Board S845WD1-E Product Guide
Table 6. Power States and Targeted System Power (continued)
Global States
Sleeping States
Processor
States
Device States
Targeted System
Power
(Note 1)
G2/S5 S5 – Soft off.
Context not saved.
Cold boot is
required.
No power D3 – no power
except for
wake-up logic.
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.
Wake-up Devices and Events
Table 7 lists the devices or specific events that can wake the computer from specific states.
Table 7. Wake-up Devices and Events
These devices/events can wake up the computer… …from this state
These devices/events can wake up the computer… …from this state
Power switch S1, S3, S4, S5
RTC alarm S1, S3, S4, S5
LAN S1, S3, S4, S5
(Note 1)
CNR S1, S3, S4
(Note 2)
, S5
(Note 2)
PME# S1, S3, S4, S5
Modem (back panel Serial Port A) S1, S3
USB S1, S3
Notes:
1. S4 state is dependent on an OS that supports this wake event.
2. For LAN and PME#, S5 is disabled by default in the BIOS Setup program. Setting this option to Power On will
enable a wake-up event from LAN in the S5 state.
✏
NOTE
The use of these wake-up events from an ACPI state requires an operating
system that provides full ACPI support. In addition, software, drivers, and
peripherals must fully support ACPI wake events.