Datasheet, Volume 1
27
Power Management
4
Power Management
This chapter provides information on the following power management topics:
• Advanced Configuration and Power Interface (ACPI) States
• System States
• Processor Core/Package States
• Integrated Memory Controller (IMC) and System Memory States
• Direct Media Interface Gen 2 (DMI2)/PCI Express* Link States
4.1
Advanced Configuration and Power Interface
(ACPI) States Supported
The ACPI states supported by the processor are described in this section.
4.1.1
System States
4.1.2
Processor Package and Core States
lists the package C-state support as:
• the shallowest core C-state that allows entry into the package C-state
• the additional factors that will restrict the state from going any deeper
• the actions taken with respect to the Ring Vcc, PLL state, and LLC.
Table 4-1.
System States
State
Description
G0/S0
Full On
G1/S3-Cold
Suspend-to-RAM (STR). Context saved to memory (S3-Hot is not supported by the
processor).
G1/S4
Suspend-to-Disk (STD). All power lost (except wakeup on PCH).
G2/S5
Soft off. All power lost (except wakeup on PCH). Total reboot.
G3
Mechanical off. All power removed from system.
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