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Can a M2 Max (30c GPU) 64GB run Granite 4.2 3B?

Yes. Granite 4.2 3B fits in fast memory on M2 Max (30c GPU) 64GB at Q8_0 (4.7 GB needed, 48.0 GB usable), about 82 tok/s (estimate).

Hardware: M2 Max (30c GPU) 64GB · Model: Granite 4.2 3B

M2 Max (30c GPU) 64GB has 64 GB of unified memory and 400 GB/s of memory bandwidth. M1 Max (32c GPU) 64GB and M2 Max (38c GPU) 64GB and M3 Max (40c GPU) 64GB have the same memory and bandwidth, so the fit numbers match; this page is M2 Max (30c GPU) 64GB. The checker leaves macOS a share of unified memory, so Ollama can use 48.0 GB. Granite 4.2 3B (3.66B, IBM) at Q8_0 is a 3.9 GB download and needs 4.7 GB with headroom for about 8k tokens.

Best quantQ8_0
Download size3.9 GB
Memory needed4.7 GB
Usable fast memory48.0 GB
Fitfits in fast memory
Estimated speed~82 tok/s (estimate)
Commandollama run granite4.2:3b-q8_0
Open M2 Max (30c GPU) 64GB in the checker

Estimates, not benchmarks. Model sizes are ollama.com download sizes; memory needed adds headroom for ~8k tokens of context; speeds are rough figures from memory bandwidth. Data updated 2026-10-23.

A project by OnDevice Labs · llms.txt