Performance & Specs
Under the hood, the Fire HDX 8.9-inch packs a 2.2 quad-core Snapdragon 800 processor with 2GB of RAM and a 400-MHz Adreno 320 graphics chip. Apple gave the iPad a superfast A7 chip with 64-bit architecture and paired it with a new M7 co-processor for motion tracking
On Geekbench 3, which measures a devices overall performance, the HDX 8.9-inch scored 2,609 on the multicore test. That showing didnt quite beat the Airs score of 2,694. On 3DMark Ice Storm Unlimited, which measures graphics performance alone, the HDX 8.9-inch registered 12,786. But the iPad Airs 14,850 score was far better. It took the Kindle Fire HDX 692.1 milliseconds to complete the Sunspider Javascript test, which is far longer than the iPad Airs 383.5 ms.
In our experience, both devices offered a smooth experience moving from one app to another. While playing Riptide GP 2″ on both devices, we enjoyed very realistic water effects. Opening Despicable Me: Minion Rush on the iPad Air took 9 seconds, compared with 11 seconds on the Fire HDX 8.9-inch. Switching between applications took the same number of taps and was complete in about 2 seconds on each device.
WINNER: iPad Air. The Kindle Fire HDX has a very zippy CPU, but the iPad Air just performs better across the board.