Exynos 5433, despite that Samsung hasn't officially revealed the silicon, and just writes "1.9 GHz octa-core processor" in its specs. It is therefore shaping up to be the first Android handset with flagship specs that will cross over into the 64-bit barrier, at least on paper. As for the GPU, it is probably ARM's latest Mali T760, clocked at the astounding 700MHz, which would add to the benchmark-busting performance of the Note 4 equipped with said Exynos.In all likeliness, the Note 4 sports precisely the latest and greatest
Why isn't Samsung advertising that fact, one would ask? Well, before Android L ships out, and there are apps that take any advantage of the 64-bit architecture, about the only tangible improvement one could do is equip the 64-bit phones and tablets with more than 3 GB of RAM, and there's not exactly a pressing need for that at the moment. With that being said, Samsung has opted to run the chipset in a regular 32-bit mode, as it will ship with KitKat out of the box, so no need to optimize for something without possible application at the moment. In any case, the Exynos-laden Note 4 could at least be futureproof, and with its Quad HD display and 64-bit architecture, it might remain so for two upgrade cycles now, instead of the typical one.