For the beginning of 2013, they plan to release two processors, the Core i7 3689Y and Core i5 3439Y, both with two physical and two logical cores and also an integrated GPU. The weaker Core i5 3439Y will be running at 1.5 GHz with Turbo Boost clock speed of 2.3 GHz for a single, or 2.1 GHz for both cores. The processor has a total of 3 MB of cache, while the graphics core runs at speeds of 350-860 MHz. The stronger Core i7 3689Y also works at 1.5 GHz with turbo running at 2.6 and 2.4 GHz (two cores), and there is a 4 MB cache. The integrated HD 4000 Graphics runs on the same clock speeds as the i5 version, and both chips have a TDP of 13 watts combined with support for DDR3 and DDR3L memory up to 1,600 MHz.
 
Intel lists both a maximum TDP and a new number, the SDP (Scenario Design Power) which is only 7 Watts. Intel states that the SDP value represents the typical power consumption during most commonly used actions under standard load, while the TDP is the maximum consumption. The Haswell version of Y Series Core chips should further reduce power consumption and also decrease heat emission, which is a very important feature for processors designed primarily for tablets.

[Ed - The SDP is a number that many people have criticized Intel for. It seems that they created a new specification so that they could claim a lower power rating. However, in the end, this is nothing that other companies have not done in the past (or still do). As of right now Intel is claiming that the use of SDP combined with TDP gives a more honest rating to the CPU instead of just listing maximums. In the end you will have to be the judge of all of this once these CPUs hit the market in products. No matter what numbers are put on the box (or a website) the performance will tell a better and more accurate story.]

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