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Can a Mac Studio M3 Ultra (80c GPU) 512GB run Nimble 9B (Bespoke Labs, decision)?

Yes. Nimble 9B (Bespoke Labs, decision) fits in fast memory on Mac Studio M3 Ultra (80c GPU) 512GB at Q8_0 (10.6 GB needed, 384.0 GB usable), about 69 tok/s (estimate).

Hardware: Mac Studio M3 Ultra (80c GPU) 512GB · Model: Nimble 9B (Bespoke Labs, decision)

Mac Studio M3 Ultra (80c GPU) 512GB has 512 GB of unified memory and 819 GB/s of memory bandwidth. The checker leaves macOS a share of unified memory, so Ollama can use 384.0 GB. Nimble 9B (Bespoke Labs, decision) (9B, Bespoke Labs) at Q8_0 is a 9.5 GB download and needs 10.6 GB with headroom for about 8k tokens.

Best quantQ8_0
Download size9.5 GB
Memory needed10.6 GB
Usable fast memory384.0 GB
Fitfits in fast memory
Estimated speed~69 tok/s (estimate)
Commandollama run nimble:9b-q8_0
Open Mac Studio M3 Ultra (80c GPU) 512GB 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