The new Exynos 8890 features an octa-core CPU comprising of 4+4 CPU clusters, arranged in big.LITTLE design. Samsung has used four Cortex-A53 cores in the smaller cluster, and on the big cluster, there are four custom cores developed by Samsung, named 'M1'. Samsung hasn't revealed the clock speeds, but it does claim that the new SoC is 30% more powerful and 10% more power efficient, when compared to the Exynos 7420 . It says that the big.LITTLE design is made more coherent with the help of SCI (Samsung Coherent Interconnect) technology, which works to offer better interaction between the two separate core clusters.
This is also the first time that Samsung has integrated the modem module into the SoC. The new, integrated modem supports Category 12/13 LTE with Carrier Aggregation, offering downlink speeds upto 600Mbps, and uplink speeds of upto 150Mbps.
Rumours have already started about the next Samsung galaxy flagship, the Galaxy S7, which might be powered by the new Exynos 8890 SoC, and is expected to be announced in February 2016.
source: Samsung unveils next generation flagship chipset, Exynos 8890 | Digit.in