While Apple's new M4-powered iPad Pro lineup set a new standard for the competition to follow, the tablets are not without caveats. For starters, their thin chassis makes them prone to structural damage. Then Apple walled off an entire CPU core for higher-end SKUs, and now, an eagle-eyed Macrumours poster has discovered something interesting about its memory.
Apple's website confirms the 256 GB and 512 GB iPad Pro variants come with 8 GB of RAM, while the higher-specced versions come with 16 GB. However, a closer look at the former's memory modules reveals they're 48 Gbit (6 GB) non-binary modules from Micron, resulting in a total memory capacity of 12 GB, of which 4 GB has been effectively walled off for unknown reasons.
Apple may have used higher capacity modules to deliver the promised memory bandwidth on the lower-end iPad Pro SKUs. Given Apple's track record, the omission could be deliberate. Others speculate it may be reserved for iPadOS 18, which is rumoured to bring forth a heap of AI-driven features. Nevertheless, there are far too many variables in the equation to jump to any conclusions, at least until Apple comments on the matter officially.