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Can a M4 Max (40c GPU) 48GB run d3 27B (vLLM Semantic Router, decision)?

Yes. d3 27B (vLLM Semantic Router, decision) fits in fast memory on M4 Max (40c GPU) 48GB at Q8_0 (32.3 GB needed, 36.0 GB usable), about 15 tok/s (estimate).

Hardware: M4 Max (40c GPU) 48GB · Model: d3 27B (vLLM Semantic Router, decision)

M4 Max (40c GPU) 48GB has 48 GB of unified memory and 546 GB/s of memory bandwidth. Mac Studio M4 Max (40c GPU) 48GB has the same memory and bandwidth, so the fit numbers match; this page is M4 Max (40c GPU) 48GB. The checker leaves macOS a share of unified memory, so Ollama can use 36.0 GB. d3 27B (vLLM Semantic Router, decision) (27B, vLLM Semantic Router) at Q8_0 is a 30 GB download and needs 32.3 GB with headroom for about 8k tokens.

Best quantQ8_0
Download size30 GB
Memory needed32.3 GB
Usable fast memory36.0 GB
Fitfits in fast memory
Estimated speed~15 tok/s (estimate)
Commandollama run d3:27b-q8_0
Open M4 Max (40c GPU) 48GB 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