Power States And Targeted System Power - Intel D850MVSE Specification

Intel Desktop Board D850MD/D850MV Technical Product Specification
1.14.1.2.1 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 10 lists the power states supported by the D850MD and D850MV boards along with the
associated system power targets. See the ACPI specification for a complete description of the
various system and power states.
Table 10.

Power States and Targeted System Power

Sleeping States
S0 – working
S1 – Processor stopped
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
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.
40
Processor
States Device States
C0 – working D0 – working state
C1 – stop grant D1, D2, D3 – 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
Targeted System
(Note 1)
Power
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 so
that service can be
performed.