Trusted Reviews has some more information on the Tegra 4
Tegra 4 is still a quad-core CPU design with a unique fifth companion core, but it uses next generation CPU cores and there are now a whopping 72 graphics cores – more than any other chip currently on the market.
Nvidia’s new 28nm ‘Wayne’ chip uses ARM’s Cortex A15 design as also found in the Samsung Exynos 5440
SOURCES - Chiphell, Trusted Reviews
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