According to Korean ETNEws reports, about 70% of the first 10 million Samsung Galaxy S4 production batch will come with Qualcomm Snapdragon 600 CPU, instead of its own Exynos 5 Octa.

The reason claimed by the site is that the System LSI division could not iron out the performance and design issues before it could be mass produced to satisfy the demand for Galaxy S4. Also because the fact that Samsung wants to bring the Galaxy S4 to as many markets as possible by the end of first half of this year and waiting for the Exynos chip could have led to delay in some markets.

Qualcomm's Snapdragon 600 is a quad-core chip that clocks at 1.9GHz whereas Samsung's Exynos 5410 comes with four Cortex-A15 cores clocking at 1.6GHz and four Cortex-A7 1.2GHz cores and supports ARM's big.LITTLE architecture.

Source: etnews