Apple’s new 2020 iPad Pro models are equipped with an A12Z Bionic processor, which is very similar to the A12X chip of the 2018 theiPad Pro models and offers little advantage in performance improvements.
However, the A12Z contains an 8-core GPU, while the A12X contains a 7-core GPU that separates it, but new evidence shared by NotebookCheck suggests that the A12Z Bionic is simply renamed the A12X chip, with its hidden GPU core enabled it is. .
According to NotebookCheck, dismantled site TechInsights confirmed that the 2018 A12X chip physically has 8 GPU cores rather than the 7 GPU cores that Apple built into the specifications. One of the cores of the A12X is disabled.
The A12X and A12Z seem to have the same physical chip on the interface, with the same number of physical CPUs and GPU cores, suggesting that the A12Z is not a new design. AnandTech also assumed that the A12Z was a repackaged version of the A12X.
There are many speculative reasons why Apple chose to do so. It is not uncommon for chip makers to disable physical cores and enable them in higher SKUs. For example, the NVIDIA Titan RTX enabled all 4,608 CUDA cores, while the RTX 2080 Ti only offers 4,352 cores, even though they both use the TU102 GPU.
Another likely explanation is that Apple’s decision to disable a GPU core in the A12X could have been deliberate. If hidden kernels were enabled as a temporary upgrade, such as the A12Z, they saved them from developing an A13X and instead focused directly on the (5nm?) A14X, which would later debut with the 5G PiPad Pro with.
In the future, TechInsights plans to conduct a floor plan analysis to determine if there is a difference between the A12X and the A12Z in the new iPad Pro models.
NotebookCheck expects Apple to save upgraded chips for future iPad Pro models, and there are indeed rumors of a second iPad Pro update this fall that could result in mini-LED displays and 5G connectivity.