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Apple A8X

The Apple A8X is a 64-bit ARM-based system on a chip (SoC) designed by Apple Inc., part of the Apple silicon series, and manufactured by TSMC. It was introduced with and only used in the iPad Air 2, which was announced on October 16, 2014. It is a variant of the A8 inside the iPhone 6 family of smartphones and Apple states that it has 40% more CPU performance and 2.5 times the graphics performance of its predecessor, the Apple A7.

Design
The A8X has three cores clocked at 1.5 GHz, a more powerful GPU compared to the A8 and it contains 3 billion transistors. Instead the A8X in the iPad Air 2 uses an external 2 GB RAM module. The A8X has video codec encoding support for H.264. It has decoding support for H.264, MPEG‑4, and Motion JPEG. == Patent litigation ==
Patent litigation
The A8X's branch predictor has been claimed to infringe on a 1998 patent. On October 14, 2015, a district judge found Apple guilty of infringing U.S. patent , "Table based data speculation circuit for parallel processing computer", on the Apple A7 and A8 processors. On September 28, 2018, the ruling was overturned on appeal and the award thrown out by the U.S. Federal Circuit Court of Appeals. The patent expired in December 2016. == Products that include the Apple A8X ==
Products that include the Apple A8X
iPad Air 2 • iPad Pro (J98 & J99, never sold) == See also ==
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