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Can a M3 16GB run Granite 4.2 8B?

Yes. Granite 4.2 8B fits in fast memory on M3 16GB at Q8_0 (10.3 GB needed, 10.7 GB usable), about 9 tok/s (estimate).

Hardware: M3 16GB · Model: Granite 4.2 8B

M3 16GB has 16 GB of unified memory and 100 GB/s of memory bandwidth. M2 16GB has the same memory and bandwidth, so the fit numbers match; this page is M3 16GB. The checker leaves macOS a share of unified memory, so Ollama can use 10.7 GB. Granite 4.2 8B (8.79B, IBM) at Q8_0 is a 9.3 GB download and needs 10.3 GB with headroom for about 8k tokens.

Best quantQ8_0
Download size9.3 GB
Memory needed10.3 GB
Usable fast memory10.7 GB
Fitfits in fast memory
Estimated speed~9 tok/s (estimate)
Commandollama run granite4.2:8b-q8_0
Open M3 16GB 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