Apple's recently launched new iPad Pro 2020 series uses the A12Z bionic processor, except that the GPU has an extra core. The parameters of this chip are almost the same as the previous A12X bionic (all the bionics are removed below). According to the current news, A12Z is likely to just activate the GPU core that was originally disabled.
According to the analysis of TechInsights, a company well-known for analyzing microprocessors and other products, Apple's A12X processor released last year has 8 GPU cores at the physical level, but somehow one of them was blocked.
TechInsights is determining whether the A12Z and A12X have the same design so that they can confirm the specific differences between the two.
The method of shielding the core is no longer a new concept. Both Intel and AMD used this method to achieve product classification (the same was true of AMD's "open core" in the same year). Nvidia also achieved similar parameters in game cards and professional cards through similar methods. Difference.
TechInsights has not yet explained why Apple has castrated a GPU core from previous products. Considering the positioning of this product itself, I think the significance of product differentiation is not significant. It should be that the technology was not mature at the time, which is conducive to mass production.
As for the effect of castration on a GPU core … A12X is already unattainable on other mobile platform processors, and Apple can naturally do whatever it wants.