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Can a M3 Max (30c GPU) 36GB run Granite 4.2 30B?

Yes. Granite 4.2 30B fits in fast memory on M3 Max (30c GPU) 36GB at Q5_K_M (23.1 GB needed, 27.0 GB usable), about 11 tok/s (estimate).

Hardware: M3 Max (30c GPU) 36GB · Model: Granite 4.2 30B

M3 Max (30c GPU) 36GB has 36 GB of unified memory and 300 GB/s of memory bandwidth. The checker leaves macOS a share of unified memory, so Ollama can use 27.0 GB. Granite 4.2 30B (29.3B, IBM) at Q5_K_M is a 21 GB download and needs 23.1 GB with headroom for about 8k tokens.

Best quantQ5_K_M
Download size21 GB
Memory needed23.1 GB
Usable fast memory27.0 GB
Fitfits in fast memory
Estimated speed~11 tok/s (estimate)
Commandollama run granite4.2:30b-q5_K_M
Open M3 Max (30c GPU) 36GB 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