Chipworks has been quick to teardown Apple's A8 processor, which is the secret sauce driving the new iPhone 6. Some details of the teardown are discussed below.
"Apple has spent quite a bit of die size on improving performance through more complex CPU and GPU architectures and miscellaneous feature additions."
A8 is fabricated on TSMC 20nm process while A7 was manufactured on Samsung 28nm process. Shrinking the transistors gate to 20nm enables the CPU to operate faster. While limiting A8 to 4 GPU cores and not 6 help to reduce the new iPhone power.
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