iPhone 18 Pro Chip Leak Indicates Major GPU and Memory Bandwidth Improvements

An alleged solder joint diagram for Apple's A20 Pro chip suggests the processor will deliver a number of significant upgrades, including a seven-core GPU, a wider memory interface, and a larger L2 cache for its efficiency cores.

The claims come from a Weibo user who says the layout was reconstructed by mapping the chip's solder ball positions and overlaying them with die level images to sketch out where each block of the processor sits. According to the post, the resulting outline points to a two and four core CPU configuration and a seven core GPU, with the top of the die housing the GPU and the CPU occupying the center.

Based on the layout, the leaker expects the A20 Pro's efficiency cores to share an 8MB L2 cache, up from 6MB on the A19 Pro, while the performance cores retain their existing 16MB L2 cache. The size of the shared system level cache is not yet known, but the leaker believes it is unlikely to shrink given the chip's new image signal processor and neural engine.

With regards to the GPU, the seven core configuration would mark an increase from the six cores on the A19 Pro, a jump of roughly 16%. The leak also points to a 96-bit memory interface for LPDDR5x RAM, up from the 64-bit interface on the A19 Pro, a 50% increase that would meaningfully boost memory bandwidth. Graphics performance tends to scale with memory bandwidth, so the wider bus could have an additional impact on top of the additional GPU core.

The A20 Pro is highly likely to debut the iPhone 18 Pro and ‌iPhone 18 Pro‌ Max next week. It could also be used in Apple's first foldable iPhone.