MediaTek, as has been rumored, announced on Saturday morning the world's first true octa-core processor; now you might be wondering about the Samsung Exynos 5 octa-core processor. As you might recall, with that chip, only one group of four cores is active at a time. With the new processor introduced by MediaTek, all eight cores are active at the same time...
Source: http://www.phonearena.com/news/MediaTek-announces-first-true-octa-core-processor_id45776
Source: http://www.phonearena.com/news/MediaTek-announces-first-true-octa-core-processor_id45776