When we brought attention to the Haswell Y series of central processing units, we didn't go into too much detail about each chip.
We figure at least one of them deserves to be detailed in full though: the Core i7-3689Y.
This isn't one of the super-low-power 7W chips, but its TDP of 13W is still very low, low enough for passively-cooled tablets.
That said, the chip is a dual-core model with four threads and Turbo Boost 2.0 technology.
Thus, while the base clock speed is of 1.5 GHz, overclocking can kick in and push it to 2.4 GHz when both cores are used, and 2.6 GHz when applications only know how to use one core.
Needless to say, the Core i7-3689Y CPU integrated an HD graphics 4000 accelerator as well (350-860 MHz).
Finally, the processor boasts 4 MB of cache memory and a memory controller for DDR3 and DDR3L of 1,600 MHz.