Colleagues on Monday managed to get clarification from Intel representatives about the technical side of SDP - it is not a new feature of mobile processors, Intel, just like previous ranking processor is used only in the design of their laptop manufacturers.
In fact, the TDP value- is the level of heat to which the cooling system of the processor can handle for a long time with no impact on the system health. The real level of heat for a short interval may exceed the TDP, and can be significantly lower. This is especially true in the case of new Intel processor, which supports dynamic overclocking Turbo Boost.
In addition to the TDP, manufacturers of mobile computers are always offered two other characteristics, the name of which comes from the reduction of power level : PL2 and PL1. The first value determines the level of energy use maximum the second - the level of energy use in the moderate load. So, in the case of processors series Y is PL1 acts as SDP, and it is 7 watts, while the TDP announced is 13 w .
Laptop manufacturer chooses the required PL1 level, based on the capabilities of the cooling system and the desired performance level. For example, the processor series U with an official TDP, equal to 17 W, provides three options PL1: 14, 17 and 20 watts. The set value PL1 manifests itself in a serious long-term loads, resulting in two laptops based on identical processors may exhibit different performance levels, if the manufacturer has provided a different PL1 value and the corresponding cooling conditions.
For Y series processors with TDP level not more than 13 W has two possible values PL1: 7 and 10 watts.