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At the heart of all tablets is a processor, and while the screen is what we look at, the processor can make or break a device.
- The iPad Air makes if of Apple's dual-core ARMv8-A 64-bit A7 processor running at 1.4GHz and a PowerVR G6430 GPU.
- The Kindle Fire HDX features 2.2GHz quad-core Snapdragon 800 processor, which also features an Adreno 330 GPU.
This is a tough call. Apple's A7 is undoubtedly a fast processor, and can see to make a dual-core part that can outperform quad-core offerings, but the Snapdragon 800 has more cores to throw at heavy tasks when the going gets hard.
Since I'm convinced that in both cases the processing power is adequate, I'm calling this one a tie.
(Image source: Apple and Amazon)