Samsung Exynos 5 Octa
It wasn't that long ago that smartphones made the jump to dual-core processors. Samsung, however, quickly upped the ante this year with its Exynos 5 Octa—and if you're wondering what the 'Octa' refers to, well, it's the processor's eight cores. While that may seem like overkill for a smartphone, Samsung puts the Octa to good use by having one quad-core ARM Cortex-A15 processor, running at up to 1.8GHz, as the primary CPU for heavy lifting, while a second quad-core ARM Cortex-A7 processor, running at up to 1.4GHz, handles lighter tasks while consuming less power. Hailed by Samsung as the world's first octa-core mobile processor, the Exynos 5 Octa is featured in the international version of the Samsung Galaxy S4 smartphone.