Intel E5-1600, E5-4600 manual Acpi States Supported, System States, Package C-State Support Sheet 1

Power Management

4Power Management

This chapter provides information on the following power management topics:

•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

•Intel QuickPath Interconnect States

4.1ACPI States Supported

The ACPI states supported by the processor are described in this section.

4.1.1System States

Table 4-1. System States

State	Description
G0/S0	Full On
G1/S3-Cold	Suspend-to-RAM (STR). Context saved to memory
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.

4.1.2Processor Package and Core States

Table 4-2lists the package C-state support as: 1) the shallowest core C-state that allows entry into the package C-state, 2) the additional factors that will restrict the state from going any deeper, and 3) the actions taken with respect to the Ring Vcc, PLL state and LLC.

Table 4-3lists the processor core C-states support.

Table 4-2. Package C-State Support (Sheet 1 of 2)

	Package C-	Core		Limiting Factors	Retention and	LLC Fully	Notes1
	State	States			PLL-Off	Flushed
	PC0 - Active	CC0	N/A		No	No	2
			•	PCIe/PCH and Remote Socket	VccMin
				Snoops	Freq = MinFreq
			•	PCIe/PCH and Remote Socket	PLL = ON
	PC2 -	CC3-CC7		Accesses		No	2
	Snoopable Idle		•	Interrupt response time
				requirement
			•	DMI Sidebands
			•	Configuration Constraints
Intel® Xeon® Processor E5-1600/E5-2600/E5-4600 Product Families							87
Datasheet Volume One