Intel i7-3740QM AW8063801105000 User Manual

Datasheet, Volume 1

67

Thermal Management 

POWER_LIMIT_1 (PL1)

14:0

SKU TDP

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. PL1 limit may be set slightly higher 

than TDP. If set higher than TDP, the processor could 

stay at that power level continuously and cooling 

solution improvements may be required.

POWER_LIMIT_1_TIME 

(Turbo Time Parameter)

23:17

1 sec

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, but 

28 seconds is recommended for most mobile 

applications. 

POWER_LIMIT_2 (PL2)

46:32

1.25 x TDP

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 nominal TDP. 

Setting this limit to TDP will limit the processor to only 

operating up to TDP, but it does not disable Turbo. 

Because Turbo is opportunistic and power/temperature 

dependant, many workloads will allow some Turbo 

frequencies at power at or below TDP.