Apple M3 Ultra (80-core GPU, 512GB)

Compare Apple M3 Ultra (80-core GPU, 512GB) against another machine in the Arena

Class: Mac
Memory: 512 GB LPDDR5
Runs (Q4_K_M): —
Bandwidth: 819 GB/s
Released: 2025-03-12
Price (US): $20600 used as of 2026-06

Sourcing and disambiguation notes

Apple discontinued the 512GB Mac Studio tier entirely on 2026-03-03 in a memory-shortage supply cut, so 'new' is categorically unavailable rather than merely unresearched; 96GB is now the maximum Apple offers. The used figure is a Swappa listing for the identical configuration (M3 Ultra 32-core, 512GB, 2TB) with confirmed SOLD status rather than an asking price. It is lower than the estimate it replaced, which runs against the shortage-inflation story rather than with it.

Specification sources

https://www.apple.com/mac-studio/specs/ — vendor, 2026-08-22
https://github.com/ml-explore/mlx/discussions/3209 — community-table, 2026-03-05

Measurements

Decode is token generation — the speed you feel while an answer streams. Prefill is prompt processing — the wait before it starts. Why bandwidth predicts decode speed.

What verified, single-source and estimated mean, and the same rows with every filter and sort in the benchmarks explorer.

Speed over time

What it can run

Fit is arithmetic, not a measurement — how it is computed. Against 512 GB; models that fit are listed largest first.