Samsung tends to use a mix of processors for its Galaxy flagship phones. The likely candidates are the Qualcomm Snapdragon 845 mobile platform and its own Exynos 9810 chipsets.
Tipster @evleaks also believed the Galaxy S9 would be powered by these processors; the Snapdragon model would be available in the U.S and China, while the global variant will run on the Exynos 9810.
Qualcomm's latest Snapdragon 845 was unveiled at the Snapdragon Summit in December last year. In a nutshell, it will deliver 300% more AI performance, 4K HDR imaging, up to 25% increase in performance compared to the Snapdragon 835, better power efficiency and faster charging. You can find out more about the Snapdragon 845 in the links below:
Samsung's latest mobile chipset is the Exynos 9810. It is built on Samsung's second generation 10nm FinFET process with a third-generation custom CPU, faster gigabit LTE modem and advanced image processing with deep learning-based software. Here's a brief rundown of its specs: