Testing Apple's 2026 16-inch MacBook Pro, M5 Max, and its new "performance" cores
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.)