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Yes, if the Mac GPU limit is raised. DeepSeek V3.1 671B (MoE) on Mac Studio M3 Ultra (80c GPU) 512GB at Q4_K_M needs sudo sysctl iogpu.wired_limit_mb=418202 (406.4 GB needed, 384.0 GB usable), about 15 tok/s (estimate).
Hardware: Mac Studio M3 Ultra (80c GPU) 512GB · Model: DeepSeek V3.1 671B (MoE)
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. DeepSeek V3.1 671B (MoE) (671B, 37B active, DeepSeek) at Q4_K_M is a 404 GB download and needs 406.4 GB with headroom for about 8k tokens.
| Best quant | Q4_K_M |
|---|---|
| Download size | 404 GB |
| Memory needed | 406.4 GB |
| Usable fast memory | 384.0 GB |
| Fit | fits if the Mac GPU limit is raised |
| Estimated speed | ~15 tok/s (estimate) |
| Mac GPU limit | sudo sysctl iogpu.wired_limit_mb=418202 |
| Command | ollama run deepseek-v3.1:671b |
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