This could be the Samsung Galaxy S4 processor

The Exynos 5440 quad-core could well be the processor which finds its way into the Samsung Galaxy S4 sometime next year.
Samsung has confirmed that the quad-core chip, based on the dual-core version found in the Korean-made Google Nexus 10 tablet, on its Kernel Git webpage - so we know that it definitely exists.
Little else is known about the Exynos 5440 at this point and there's no guarantee that it will be the processor of choice for the Galaxy S4 but it's certainly a strong contender.

Four, not eight

This could put to bed rumours suggesting the Galaxy S4 may sport a quite frankly ridiculous eight-core processor although we're not completely ruling out that option just yet.
According to various sources, the Samsung Galaxy S4 will rock up with a full HD display somewhere in the region of 5-inches, boast a powerful 13MP camera and run the latest version of Android – possibly even Key Lime Pie.
More rumours suggest that Samsung will look to launch the Galaxy S4 in April with the Korean firm getting its next flagship smartphone out early on, but we're yet to hear anything official from the manufacturer itself.

From Samsung via Android Community