Last year's Samsung Galaxy S7 and S7 edge were powered either by the Korean company's own Exynos 8 Octa chipset or Qualcomm's Snapdragon 820, depending on which market you bought one from. This year most leaks and rumors that have talked about the Galaxy S8 have focused on it sporting the upcoming Snapdragon 835, and how that impacts Samsung's competitors. However, it turns out that the S8 (and S8+) could have two separate versions too, each boasting a different chipset. While the SD835 will be inside the handsets in some places, in others you may find them powered by a yet-unannounced...
Source: http://www.gsmarena.com/samsung_teases_exynos_9_chipset_which_could_be_powering_the_galaxy_s8-news-23494.php