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Can a Mac Studio M5 Ultra (80c GPU) 256GB run Qwen 2.5 Coder 14B?

Yes. Qwen 2.5 Coder 14B fits in fast memory on Mac Studio M5 Ultra (80c GPU) 256GB at Q8_0 (17.3 GB needed, 192.0 GB usable), about 60 tok/s (estimate).

Hardware: Mac Studio M5 Ultra (80c GPU) 256GB · Model: Qwen 2.5 Coder 14B

Mac Studio M5 Ultra (80c GPU) 256GB has 256 GB of unified memory and 1200 GB/s of memory bandwidth. Mac Studio M5 Ultra (64c GPU) 256GB has the same memory and bandwidth, so the fit numbers match; this page is Mac Studio M5 Ultra (80c GPU) 256GB. The checker leaves macOS a share of unified memory, so Ollama can use 192.0 GB. Qwen 2.5 Coder 14B (14.8B, Alibaba) at Q8_0 is a 16 GB download and needs 17.3 GB with headroom for about 8k tokens.

Best quantQ8_0
Download size16 GB
Memory needed17.3 GB
Usable fast memory192.0 GB
Fitfits in fast memory
Estimated speed~60 tok/s (estimate)
Commandollama run qwen2.5-coder:14b-instruct-q8_0
Open Mac Studio M5 Ultra (80c GPU) 256GB 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