Intel Haswell CORE and PACKAGE States

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==Haswell CORE States and PACKAGE States==
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CORE C-States:
C0  =	Executing code

C1  =	HALT* instruction accepted
	Some clocks removed

C1E =	HALT* instruction accepted
	Most clocks removed
	Voltage reduced to lowest performance state (Pn)

C3  =	HALT* instruction accepted,
	All clocks removed
	Voltage reduced to lowest performance state (Pn)
	L1/L2 cache flushed into L3

C6  =	HALT* instruction accepted
	CORE state is saved
	CORE is power-gated (0V)

C7  =	Same as C6

C8  =	Same as C6
	Mobile (ULT/ULX) Only

C9  =	Same as C6
	Mobile (ULT/ULX) Only

C10 =	Same as C6
	Mobile (ULT/ULX) Only


PACKAGE C-States:
C0  =	Usually a GT†/CORE is executing code but-
	-can be valid for GT/CORE from C0 to C10

C3  =	All GT & CORE in C3 or higher
	L3 cache may be flushed and power-gated (0V)
	Memory in auto-refresh mode
	Most Uncore clocks removed
	Some Uncore voltages lowered

C6  =	All GT & CORE in C6 or higher
	L3 cache may be flushed and power-gated (0V)
	Memory in auto-refresh mode
	All Uncore clocks removed
	Some Uncore voltages lowered

C7  =	All GT & CORE in C7 or higher
	L3 cache flushed and power-gated (0V)
	Memory in auto-refresh mode
	All uncore clocks removed
	More Uncore voltages lowered

C8  =	All GT & CORE in C8 or higher
	L3 flushed and power-gated (0V)
	Memory in auto-refresh mode
	All uncore clocks removed
	Most Uncore voltages power-gated
	Mobile (ULT/ULX) Only

C9  =	All GT & CORE in C9 or higher
	L3 flushed and power-gated (0V)
	Memory in auto-refresh mode
	All uncore clocks removed
	Most Uncore voltages power-gated (0V)
	Voltage regulator goes into low-power state
	Mobile (ULT/ULX) Only

C10 =	All GT & CORE in C10 or higher
	L3 flushed and power-gated (0V)
	Memory in auto-refresh mode
	All uncore clocks removed
	Most Uncore voltages power-gated
	Voltage regulator gets turned off
	Mobile (ULT/ULX) Only


* HALT = No longer executing code
† GT   = iGPU or Intel HD Graphics