Comparison
NVIDIA DGX Spark vs Mac Studio M3 Ultra 96GB for local LLMs
NVIDIA DGX Spark (115.2GB usable, 273 GB/s) vs Mac Studio M3 Ultra 96GB (72GB usable, 819 GB/s) for local LLMs: capacity decides which models load at all, memory bandwidth decides the speed tier. Verdicts below are computed per model at each machine's best clean quant.
NVIDIA DGX Spark verdicts are beta: fit is physics and holds, but speed tiers aren't calibrated yet for that hardware class.
| Spec | NVIDIA DGX Spark | Mac Studio M3 Ultra 96GB |
|---|---|---|
| Type | NVIDIA prebuilt | Apple prebuilt |
| Memory for models | 115.2 GB GPU-usable unified | 72 GB GPU-usable unified |
| Memory bandwidth | 273 GB/s | 819 GB/s |
| Price | $4,699 base price | $5,299 base price |
| Backends | CUDA | Metal |
Specs as of 2026-07-11 — sources on each product page.
What each can run, head to head
The 12 most-downloaded models we track, each graded at that machine's best clean-fit quant (llama.cpp, 8K context). Click a verdict for the full breakdown.
Affiliate link — we may earn a commission. Verdicts are computed before any link is attached.
Verdicts computed from published specs and measured GGUF sizes — how the math works.