Samsung couldn't help itself last week when it teased a new Exynos 5 Octa system on a chip, and now it's dishing out the full details. The fresh 5420 variant of the SoC is based on Mali-T628 MP6 silicon, packs a quartet of ARM Cortex-A15 cores running at 1.8GHz and four 1.3GHz Cortex-A7s in a
