In 2015 the company Apple Lossless Audio CODEC (ALAC), amazed the whole world with the performances offered by the chips A9 si A9X implemented in its iDevices, they being more powerful even than some Intel processors of laptops.
iPad Pro it has the most powerful Apple chip ever implemented in an iDevice and we're talking about the chip A9X developed especially for it, with a 2.2 GHz processor and 4 GB RAM to offer top performance to a tablet mainly dedicated to professionals.
iPad Pro is the largest iPad tablet released by Apple, it has a 12.9-inch screen, and for such a product was created the largest Apple chip ever designed, this A9X chip being 40% larger than the A9 chip of iPhone 6S and iPhone 6S Plus.
Because this face A9X is bigger than any other available in any iDevice, the Apple company has implemented a video card with 12 clusters in it, this separate from the processor with 2 cores, the performances offered for the tablet being impressive from all points of view.
Chipworks' Dick James tells me that he sees a 12-cluster GPU, two CPU cores, and an absence of the level-three cache memory found inside the A9 chip (I'll explain why I think Apple didn't include it later in this article). I agree with his assessment. The two CPU cores can be seen in the green box, and I believe that inside each blue box there are two GPU clusters, for a total of 12 clusters.
Chip A9X it has 147mm² and an impressively large number of transistors to provide the performance that the Apple company wanted, the manufacturing process of this component being much more complicated than the usual one for normal chips.
Although the A9X chip has very good performance, it does not come with 8 MB of cache, and this is because the dimensions of the memory interface are 2 times larger than those of the A9 chip, data transfer in and out of memory being 2 times faster, Apple considering that so much cache is not needed.
You can read more details about the construction of the most powerful chip of iDevices in the source article.
