Intel i3-2328M FF8062701275100 Data Sheet

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Datasheet, Volume 1

When operating in the turbo mode, the processor will monitor its own power and adjust 
the turbo frequency to maintain the average power within limits over a thermally 
significant time period. The package, processor core, and graphic core powers are 
estimated using architectural counters and do not rely on any input from the platform. 

The behavior of turbo is dictated by the following controls that are accessible using 
MSR, MMIO, or PECI interfaces:

• POWER_LIMIT_1: TURBO_POWER_LIMIT, MSR 610h, bits 14:0. This value sets 

the exponentially weighted moving average power limit over a long time period. 
This is normally aligned to the TDP of the part and steady-state cooling capability of 
the thermal solution. This limit may be set lower than TDP, real-time, for specific 
needs, such as responding to a thermal event. If set lower than TDP, the processor 
may not be able to honor this limit for all workloads since this control only applies 
in the turbo frequency range; a very high powered application may exceed 
POWER_LIMIT_1, even at non-turbo frequencies. The default value is the TDP for 
the SKU.

• POWER_LIMIT_1_TIME: TURBO _POWER_LIMIT, MSR 610h, bits 23:17. This 

value is a time parameter that adjusts the algorithm behavior. The exponentially 
weighted moving average turbo algorithm will use this parameter to maintain time 
averaged power at or below POWER_LIMIT_1. The default value is 1 second; 
however, 28 seconds is recommended for most mobile applications.

• POWER_LIMIT_2: TURBO_POWER_LIMIT, MSR 610h, bits 46:32. This value 

establishes the upper power limit of turbo operation above TDP, primarily for 
platform power supply considerations. Power may exceed this limit for up to 
10 mS. The default for this limit is 1.25 x TDP.

The following considerations and limitations apply to the power monitoring feature:

• Calibration applies to the processor family and is not conducted on a part-by-part 

basis. Therefore, some difference between actual and reported power may be 
observed.

• Power monitoring is calibrated with a variety of common, realistic workloads near 

Tj_max. Workloads with power characteristic markedly different from those used 
during the calibration process or lower temperatures may result in increased 
differences between actual and estimated power.

• In the event an uncharacterized workload or power “virus” application were to 

result in exceeding programmed power limits, the processor Thermal Control 
Circuitry (TCC) will protect the processor when properly enabled. Adaptive Thermal 
Monitor must be enabled for the processor to remain within specification.

Illustration of Intel Turbo Boost Technology power control is shown in the following 
sections and figures. Multiple controls operate simultaneously allowing for 
customization for multiple system thermal and power limitations. These controls allow 
for turbo optimizations within system constraints.