Every Mac Studio generation, with the memory bandwidth and unified memory that decide which models it can run. Pick a chip for its full model fit breakdown.
The M5 Ultra is the current generation at 1228 GB/s and up to 512 GB. On the used market the M3 Ultra is the one to look for: 819 GB/s and up to 512 GB, which is the pairing that decides what runs, and neither figure changes with the age of the machine.
1228 GB/s · 96 to 512 GB unified memory
Holds about a 696B model at Q4
460 to 614 GB/s · 36 to 128 GB unified memory
Holds about a 172B model at Q4
819 GB/s · 96 to 512 GB unified memory
Holds about a 696B model at Q4 · Used market
410 to 546 GB/s · 36 to 128 GB unified memory
Holds about a 172B model at Q4 · Used market
800 GB/s · 64 to 192 GB unified memory
Holds about a 260B model at Q4 · Used market
400 GB/s · 32 to 96 GB unified memory
Holds about a 129B model at Q4 · Used market
800 GB/s · 64 to 128 GB unified memory
Holds about a 172B model at Q4 · Used market
400 GB/s · 32 to 64 GB unified memory
Holds about a 85B model at Q4 · Used market
Apple has not announced any of this. The M7 Max and Ultra are the first parts Apple designed after cancelling a generation to reach them, so extrapolating from the M5 under-represents them. These rows assume LPDDR6, whose wider channels grow every bus by half, at its top speed bin by the time the Max and Ultra ship. The 1.5 TB Ultra ceiling is Bloomberg's reported design target, and whether that configuration ships depends on the memory market. Stacked memory or a new package fabric would land above these numbers; nobody outside Apple can price that yet.
Projected chip · expected 2027
1382 GB/s · 48 to 384 GB unified memory
20-core CPU · 56 or 64-core GPU · 76 TOPS Neural Engine
Would hold about a 521B model at Q4
Projected chip · expected 2028
2765 GB/s · 256 to 1536 GB unified memory
40-core CPU · 112 or 128-core GPU · 152 TOPS Neural Engine
Would hold about a 2092B model at Q4
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