From The Apple Wiki

The S5L8940 is the Apple A5 processor used in the iPad 2 (except the Mid-2012 model) and the iPhone 4S. Manufactured by Samsung, the processor itself is dual-core. The processor (H4P) is clocked at 850MHz in most configurations.


The S5L8940 chipset has a 45nm dual core PowerVR SGX543MP2 GPU which is clocked at 200MHz.

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