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Can a M3 24GB run Granite 4.2 3B?

Yes. Granite 4.2 3B fits in fast memory on M3 24GB at Q8_0 (4.7 GB needed, 16.1 GB usable), about 21 tok/s (estimate).

Hardware: M3 24GB · Model: Granite 4.2 3B

M3 24GB has 24 GB of unified memory and 100 GB/s of memory bandwidth. M2 24GB has the same memory and bandwidth, so the fit numbers match; this page is M3 24GB. The checker leaves macOS a share of unified memory, so Ollama can use 16.1 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 memory16.1 GB
Fitfits in fast memory
Estimated speed~21 tok/s (estimate)
Commandollama run granite4.2:3b-q8_0
Open M3 24GB 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