Apple’s M5 Pro and M5 Max make deceptively large changes to how Apple’s high-end laptop and desktop chips are built.
We’ve already covered those changes in some depth, but in essence: The M5 Pro and M5 Max are no longer monolithic chips with all the CPU and GPU cores and everything else packed into a single silicon die. Using an “all-new Fusion Architecture” like the one used to combine two Max chips into a single Ultra chip, Apple now splits the CPU cores (and other things) into one piece of silicon, and the GPU cores (and other things) into another piece of silicon. These two dies are then packaged together into one chip.
M5 Pro and M5 Max both use the same 18-core CPU die, but Pro uses a 20-core GPU die, and Max gets a 40-core GPU die. (Because the memory controller is also part of the GPU die, the Max chip still offers more memory bandwidth and supports higher memory configurations than the Pro one does.)
The other big change is that neither of these chips uses Apple’s “efficiency” CPU cores anymore. All of the M5 family’s large high-performance cores are now called “super” cores as of macOS 26.3.1, including the ones that originally launched as “performance” cores in the regular M5 last fall. The standard M5 still has smaller, slower efficiency cores, but M5 Pro and M5 Max use a third kind of CPU core instead, confusingly also called “performance” cores.
Fastest cores “Medium” cores Efficiency cores GPU cores Memory bandwidth M5 Max Up to 6 (“super”) Up to 12 (“performance”) 0 Up to 40 Up to 614 GB/s M5 Pro Up to 6 (“super”) Up to 12 (“performance”) 0 Up to 20 307 GB/s MHz M5 4 (“super”) 0 6 Up to 10 153 GB/s M4 Max Up to 12 (“performance”) 0 4 Up to 40 Up to 546 GB/s M5 Up to 10 (“performance”) 0 4 Up to 20 273 GB/s M4 4 (“performance”) 0 6 Up to 10 120 GB/s
Users will experience the M5 Pro and M5 Max mostly as the expected iterative upgrades over last-generation chips, the same thing delivered by most new Apple Silicon processor generations. But for the technically inclined, it’s worth digging a little deeper into the M5 Max, both to learn why it performs the way it does and to dispel confusion about what’s being rebranded (the new “super” cores), and what’s actually different (the new “performance” cores in M5 Pro and M5 Max, which definitely aren’t just rebranded efficiency cores).