A12Z Chip in iPad Pro Confirmed to Be Same As A12X, But With Extra GPU Core Enabled
Our analysis confirms #Apple #A12Z GPU chip found inside #iPadPro (model A2068) is the same as A12X predecessor. A report of our findings is underway & will be available as part of TechInsights' #Logic Subscription. Learn more here https://t.co/WWQqlPorNF pic.twitter.com/RsQEADpZsc — TechInsights (@techinsightsinc) April 13, 2020
Apple didn't highlight changes to CPU performance, but there is one difference - the A12Z features an 8-core GPU, while the A12X has a 7-core GPU.
Information provided in March by TechInsights suggested that the A12X was simply an 8-core GPU chip with one GPU core disabled, indicating the A12Z is a re-binned A12X with that latent GPU core enabled.
At the time, TechInsights said that it planned to conduct a floorplan analysis to determine whether there are any differences between the A12X and the A12Z, which has now been completed, and the GPU chips are the same. A full report on TechInsights findings will be available on its website to those with a subscription.
It is not unusual for chip manufacturers to disable one core of a processor when a chip isn't meeting yield levels, and that's perhaps what happened with the A12X. The manufacturing of the chip has now improved enough that yields have gotten better and all 8 cores are functional, resulting in the A12Z chip.