Intel BX80646E31230V3, BX80646E31240V3 4.1Advanced Configuration and Power Interface (ACPI) States Supported

Power Management—Processor

4.1Advanced Configuration and Power Interface (ACPI) States Supported

	This section describes the ACPI states supported by the processor.
Table 9.	System States
	State	Description
	G0/S0	Full On Mode.
	G1/S3-Cold	Suspend-to-RAM (STR). Context saved to memory (S3-Hot state 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.
Table 10.	Processor Core / Package State Support
	State	Description
	C0	Active mode, processor executing code.
	C1	AutoHALT state.
	C1E	AutoHALT state with lowest frequency and voltage operating point.
	C3	Execution cores in C3 state flush their L1 instruction cache, L1 data cache, and L2 cache
		to the L3 shared cache. Clocks are shut off to each core.
	C6	Execution cores in this state save their architectural state before removing core voltage.
		Execution cores in this state behave similarly to the C6 state. If all execution cores
	C7	request C7 state, L3 cache ways are flushed until it is cleared. If the entire L3 cache is
		flushed, voltage will be removed from the L3 cache. Power removal to SA, Cores and L3
		will reduce power consumption. C7 may not be available on all SKUs.
Table 11.	Integrated Memory Controller States
	State	Description
	Power up	CKE asserted. Active mode.
	Pre-charge	CKE de-asserted (not self-refresh) with all banks closed.
	Power-down
	Active Power-	CKE de-asserted (not self-refresh) with minimum one bank active.
	down
	Self-Refresh	CKE de-asserted using device self-refresh.
Table 12.	PCI Express* Link States
	State	Description
	L0	Full on – Active transfer state.
	L0s	First Active Power Management low power state – Low exit latency.
	L1	Lowest Active Power Management – Longer exit latency.
	L3	Lowest power state (power-off) – Longest exit latency.

	Intel® Xeon® Processor E3-1200 v3 Product Family
June 2013	Datasheet – Volume 1 of 2
Order No.: 328907-001	49