The A5X isn't the only new chip that Apple introduced this year.
New iPad 2 and Apple TV Pack Tweaked A5 Chip on 32nm : Read more
New iPad 2 and Apple TV Pack Tweaked A5 Chip on 32nm : Read more
The older A5s were manufactured on Samsung's 45nm process while the chip now found in the new Apple TV and the $399 iPad 2 is manufactured on Sammy's 32nm process
now found in the new Apple TV and the $399 iPad 2 is manufactured on Sammy's 32nm process, which would improve performance and reduce power consumption.