“For the first time since the iPad 2 and iPhone 4S shared the A5 SoC back in 2011, the flagship iPhones and iPads are using the same silicon,” Cunningham reports. “The A7 in the iPhone 5S gives you two of Apple’s 64-bit ARMv8 ‘Cyclone’ CPU cores, an Imagination Technologies PowerVR G6430 GPU, 1GB of LPDDR3 RAM, and a 64-bit memory interface. Anand Shimpi of AnandTech says that the iPad Air uses the same chip at a hardware level, just in a different configuration. For example, the iPad’s Air’s A7 runs at a base CPU clock speed of 1.4GHz, up very slightly from the 1.3GHz of the iPhone 5S. Further clock speed increases are probably theoretically possible, but increasing clock speeds by large amounts requires a correspondingly large amount of power. It is not an ideal way to increase performance. Because the iPad is larger and leaves Apple more room to dissipate heat, the iPad’s A7 can also sustain higher CPU clock speeds for longer periods of time.”
Much more in the full article here.