The Samsung Exynos 5 Octa offers four Cortex-A15 cores and four Cortex-A7 cores using the ARM big.LITTLE architecture, aimed at achieving the best power consumption and consumption ratio. The following video demo shows how the Exynos 5 Octa handles general tasks on a reference board which was on display at the ongoing MWC.The demonstrations explains how the various cores take over various tasks to achieve the performance while saving power for the user along with the graphics abilities of the processor.
source – PhoneArena