Can a Mac Studio M3 Ultra 96GB run Llama-3.1-70B-Instruct?
Yes. Llama-3.1-70B-Instruct needs 61.2GB at Q6_K with llama.cpp and 8K context; the Mac Studio M3 Ultra 96GB has 96GB of unified memory (~75% GPU-addressable) (71.5GB usable) — grade B, with decode speed in the painful tier.
Mac Studio M3 Ultra 96GB · Llama-3.1-70B-Instruct · Q6_K
✅ Fits — grade B
Painful
weights 57.9 GBKV cache 2.68 GBoverhead 0.62 GBpool 71.5 GBneeds 61.2 GB
assumes llama.cpp · batch 1 · 8K context · fp16 KV cache
$5,299 MSRP · as of 2026-07-11
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Every quant, graded
Mac Studio M3 Ultra 96GB × Llama-3.1-70B-Instruct, llama.cpp, 8K context.
| Quant | File size | Fit | Speed tier |
|---|---|---|---|
| Q8_0 | 75.0 GB | Won't fit | |
| Q6_K | 57.9 GB | Fits · B | painful |
| Q5_K_M | 50.0 GB | Fits · B | usable |
| Q4_K_M | 42.5 GB | Fits · A+ | usable |
Llama-3.1-70B-Instruct on similar hardware
More models on the Mac Studio M3 Ultra 96GB
Verdict computed from published specs and measured GGUF file sizes — see how the math works.