Everything you need to know about the Apple A6 system-on-a-chip and Apple's first, custom Swift processor
The Apple A6 represents Apple's first, custom system-on-a-chip (SoC) and powered not only the iPhone 5 but - in A6X form - the iPad 4 as well. Instead of merely licensing an existing design, like they did for the A5, Apple licensed the ARMv7 instruction set architecture (ISA) and rolled their own core, called Swift. They paired it with a PowerVR SGX graphics processor - 3 cored for the iPhone 5, 4 cores for the iPad 4 - and topped it off with 1GB of RAM. Apple also included a powerful image signal processor (ISP), making the iPhone 5 iSight camera one of the best in the world at every day photography.