AC82G41SLGQ3 Datasheet, PDF (549/604 Pages) Intel Corporation – Intel® 4 Series Chipset Family

Functional Description
13.10 Power Management
The (G)MCH has many permutations of possibly concurrently operating modes.
Obviously, care should be taken (Hardware and Software) to disable unused sections of
the silicon when this can be done with sufficiently low performance impact.
Refer to the ACPI Specification, Revision 3.0 for an overview of the system power
states mentioned in this section.
13.10.1 Main memory Power Management
Table 38.
Table 39.
Targeted Memory State Conditions
Mode
Memory State with Internal
Graphics
C0, C1, C2
C3, C4
S3
S4
Dynamic memory rank power down
based on idle conditions
Dynamic memory rank power down
based on idle conditions
If graphics engine is idle, no display
requests, and permitted display
configuration, then enter self-refresh.
Otherwise use dynamic memory rank
power down based on idle conditions
Self Refresh Mode
Memory power down (contents lost)
Memory State with External
Graphics
Dynamic memory rank power down
based on idle conditions
Dynamic memory rank power down
based on idle conditions
If there are no memory requests, then
enter self-refresh. Otherwise, use
dynamic memory rank power down
based on idle conditions
Self Refresh Mode
Memory power down (contents lost)
This section details the support provided by the (G)MCH corresponding to the various
processor/Display/System ACPI states. Descriptions provided in this section should be
used in Section 13.10.3.
Platform System States
State
Description
G0/S0
G1/S1
G1/S3-Cold
G1/S4
G2/S5
G3
Full On
Stop Clock. Clock to processor still running. Clock stopped to processor core.
Processor thread synchronization not required
Suspend to RAM (STR). Context saved to memory (S3-Hot is not supported by
the (G)MCH)
Suspend to Disk (STD). All power lost (except wakeup on ICH)
Soft off. All power lost (except wakeup on ICH). Total reboot
Hard off. All power (AC and battery) removed from system
Datasheet
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