The CPUs Core i5-3340M, i5-3437U, i5-3380M, i7-3540M and i7-3687U were known to be coming out soon but their details were largely unknown. Although Intel has neither made any loud statements nor given many details, but the specifications of these CPUs are, more or less reportedly known now.
Core i5-3340M, i7-3540M and i5-3380M are suited for mainstream laptops while ultrabooks will get Core i7-3687U and Core i5-3437U. The only similarities that the CPUs share are that all of them consist of two cores as well as four threads with the rest of their features different.
i5-3340M has cache memory of 3 MB, running at 2.7 GHz with a Turbo Frequency limit 3.4 GHz, an integrated GPU having 650/1,250 MHz and finally a Thermal Design Power (TDP) of 35 watts. i5-3380M is almost identical to i5-3340M except that its chip runs at 2.9/3.6 GHz
Core i5 is made for ultrabooks and as such will be slower with a GPU of 350/1200 MHz , and the chip running at a frequency 1.9/2.9 GHz. This CPU is also less energy-demanding with a TDP of 17 Watts.
Core i7-3684 U is also intended as an ultrabook chip running at 2.1/3.3 GHz and GPU of 250/1200 MHz with the TDP 17 Watts.
Lastly, i7-3540M has a 3/3.7 GHz processor with a GPU of 650/1300 MHz. This CPU has 4 MB Cache and a TDP of 35 Watts.
The processors, fabricated with BGA packages cannot be removed from the ‘motherboards’ of the laptops, unlike the case of LGA chips.