Intel BXF80646I74770K Package C-State Entry and Exit, Package C0 State, Package C1/C1E State

Models: BX80633I74960X BX80646I34130 BX80646I54430 BX80646I74770K BX80646I74770 BX80646I54570S BX80646I74770S BXF80646I74770K CM8063701159502 CM8063701212200 BX80637I73770K CM8064601466003 CM8064601466200

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Figure 14. Package C-State Entry and Exit

Power Management—Processor

Figure 14. Package C-State Entry and Exit

C0

C3

C6

C1

Package C0 State

C7

This is the normal operating state for the processor. The processor remains in the normal state when at least one of its cores is in the C0 or C1 state or when the platform has not granted permission to the processor to go into a low-power state. Individual cores may be in lower power idle states while the package is in C0 state.

Package C1/C1E State

No additional power reduction actions are taken in the package C1 state. However, if the C1E sub-state is enabled, the processor automatically transitions to the lowest supported core clock frequency, followed by a reduction in voltage.

The package enters the C1 low-power state when:

At least one core is in the C1 state.

The other cores are in a C1 or deeper power state.

The package enters the C1E state when:

All cores have directly requested C1E using MWAIT(C1) with a C1E sub-state hint.

All cores are in a power state deeper than C1/C1E state; however, the package low-power state is limited to C1/C1E using the PMG_CST_CONFIG_CONTROL MSR.

All cores have requested C1 state using HLT or MWAIT(C1) and C1E auto- promotion is enabled in IA32_MISC_ENABLES.

No notification to the system occurs upon entry to C1/C1E state.

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

December 2013

Datasheet – Volume 1 of 2

Order No.: 328897-004

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Intel BXF80646I74770K, CM8064601466200 manual Package C-State Entry and Exit, Package C0 State, Package C1/C1E State