מה ההבדל בינהם ? מתי אני רוצה או לא רוצה להפעיל אותן ? מי עדיפה ? מה ההבדל בינהם ?

חיפשתי מידע בגוגל, מצאתי הרבה על EIST אבל כמעט כלום על C1E... אשמח למידע או הסבר קצרצר...

מצאתי הסבר ישן על מעבד סלרון שהכיל הסבר על ה C1E:

Extended Halt State (C1E)

The Intel® Celeron® Processor 1.66 GHz/1.83 GHz Extended Halt State (C1E) enables

significant power savings. Extended HALT state is a low power state entered when the

processor core has executed the HALT or MWAIT instructions and Extended HALT state

has been enabled via the BIOS. When the processor core executes the HALT

instruction, the core is halted. The Extended HALT state is a lower power state than the

HALT state or Stop Grant state.

Note: The Extended HALT (C1E) state must be enabled for the processor to remain within its

specifications.

The Extended HALT state requires support for dynamic VID transitions in the platform.

The processor automatically transitions to a lower core frequency and voltage operating

point before entering the Extended HALT state. Note that the processor FSB frequency

Intel® Celeron® Processor 1.66 GHz/1.83 GHz—Low Power Features

Intel® Celeron® Processor 1.66 GHz/1.83 GHz

is not altered; only the internal core frequency is changed. When entering the low

power state, the processor first switches to the lower bus to core frequency ratio and

then transition to the lower voltage (VID).

While in the Extended HALT(C1E) state, the processor processes bus snoops. The

processor exits the Extended HALT state when a break event occurs. When the

processor exits the Extended HALT state, it first transitions the VID to the original value

and then changes the bus to core frequency ratio back to the original value.

Intel® Celeron® Processor 1.66 GHz/1.83 GHz

אם אני ימצא משהו על EIST אני יעדכן..

מצאתי הסבר קצת ארוך של אינטל..

http://www.intel.com/cd/channel/reseller/asmo-na/eng/203838.htm