Intel BX80635E52697V2 Manual Do Utilizador

 

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Intel® Xeon® Processor E5-1600 v2/E5-2600 v2 Product Families 

Datasheet Volume One of Two

SVID/frequency points. Transition of the SVID code will occur first, to insure proper 

operation once the processor reaches its normal operating frequency. Refer to 

 for an illustration of this ordering.

Clock modulation is performed by alternately turning the clocks off and on at a duty 
cycle specific to the processor (factory configured to 37.5% on and 62.5% off for TM1). 

The period of the duty cycle is configured to 32 microseconds when the TCC is active. 

Cycle times are independent of processor frequency. A small amount of hysteresis has 
been included to prevent rapid active/inactive transitions of the TCC when the 

processor temperature is near its maximum operating temperature. Once the 

temperature has dropped below the maximum operating temperature, and the 
hysteresis timer has expired, the TCC goes inactive and clock modulation ceases. Clock 

modulation is automatically engaged as part of the TCC activation when the 

Frequency/SVID targets are at their minimum settings. It may also be initiated by 
software at a configurable duty cycle.

The processor provides an auxiliary mechanism that allows system software to force 

the processor to reduce its power consumption. This mechanism is referred to as “On-
Demand” mode and is distinct from the Adaptive Thermal Monitor feature. On-Demand 

mode is intended as a means to reduce system level power consumption. Systems 

must not rely on software usage of this mechanism to limit the processor temperature. 
If bit 4 of the IA32_CLOCK_MODULATION MSR is set to a ‘1’, the processor will 

immediately reduce its power consumption via modulation (starting and stopping) of 

the internal core clock, independent of the processor temperature. When using On-