Intel BX80646I34130 manual Advanced Configuration and Power Interface ACPI States Supported

Processor—Power Management

4.1Advanced Configuration and Power Interface (ACPI) States Supported

	This section describes the ACPI states supported by the processor.
Table 11.	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 12.	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 13.	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 14.	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.

Desktop 4th Generation Intel® Core™ Processor Family, Desktop Intel® Pentium® Processor Family, and Desktop Intel® Celeron® Processor Family

Datasheet – Volume 1 of 2	December 2013
50	Order No.: 328897-004