Here's why Samsung didn't mention the chip driving the international variant of Galaxy S5 at its Unpacked presentation, because it hadn't been launched yet, at the time. Called Exynos Octa 5422, the chip is an incremental upgrade over the Exynos Octa 5420, which drives the Galaxy Note 3. Oh, and the Hexa 5260, a six-core big.LITTLE chip.

　　The Exynos Octa 5422, like the 5420 and the 5410, features an eight-core CPU that's an ARM big.LITTLE configuration of a quad-core Cortex-A15 subunit, and a quad-core Cortex-A7 one. The performance-oriented Cortex-A15 subunit is clocked at 2.10 GHz, and the efficiency-oriented Cortex-A7 one at 1.50 GHz. Like a typical big.LITTLE config, application load decides which subunit is active at a given time. In addition, this chip features a ARM Mali-T628 GPU.

　　The Exynos Hexa 5260, on the other hand, is a six-core chip, with a big.LITTLE config of a dual-core Cortex-A15 subunit clocked at 1.70 GHz, and a quad-core Cortex-A7 subunit running at 1.30 GHz. It features the same GPU as the Octa 5420.

　　Both chips feature dual-channel memory controllers, eDP (embedded DisplayPort) pins with enough bandwidth to handle WQHD (2560 x 1440 pixels) displays, cameras with ISOCELL sensors, with resolutions as high as 16-megapixel, a 3rd generation NFC PHY, and an 802.11 b/g/n WiFi interface (up to 300 Mbps). The two continue to use external soft-modems for cellular connectivity. The international variants of Galaxy S4 and Galaxy Note 3 use soft-modem chips made by Intel, which support 3G HSPA+ (up to 21.1 Mbps).

　　Both chips support Samsung's much hyped Heterogeneous Multi-Processing (HMP) software support, which lets a device fire up all its cores to handle extreme processing loads, although on the ground, we're yet to see it implemented.

　　Both the Exynos Octa 5422 and Exynos Hexa 5260 are currently in mass-production. It wouldn't surprise us if the latter is featured on the Galaxy S5 Mini.