Apple's upcoming iPad Air 2 and the rumored 12.9-inch iPad, dubbed by the media the ‘iPad Pro’, will both run an enhanced “A8X” processor with improved graphics, GforGames claimed Thursday citing Taiwan’s TechNews [Google Translate].
Last year's debut of the iPhone 5s, iPad Air and iPad mini with Retina display driven by the A7 chip broke Apple's previous practice of maintaining two separate mobile processor families, one for iPhones and 'X' version powering the iPads.
The fact of the matter is, the A7 and A8 chips are powerful enough to drive graphics on both smartphone and tablet displays. That said, if there's an A8X chip in tow for the rumored 12.9-inch device, chances are it'll come outfitted with an ultra high-resolution screen that would require a more powerful GPU than that found inside the A8 chip.