DGX Spark, GB10 Grace Blackwell, 128GB vs Mac Studio, M5 Max, 128GB
Both hold Llama-3.3-70B at Q4_K_M. Mac Studio, M5 Max, 128GB decodes an est. 9.4 tok/s against 4.2, and costs $400 more — $76.26.88923979246647 per extra token per second. Worth it if you read the output as it arrives; not if you queue jobs.
- Fit
- Fits
- Fits
- Headroom
- 74GB
- 74GB
- Est. speed
- 4.2 tok/s
- 9.4 tok/s
- Cheapest today
- $4,699 at NVIDIA
- $5,099 at Apple
- Per GB of memory
- $37
- $40
- Memory
- 128GB unified LPDDR5X memory
- 128GB unified memory
- Usable for a model
- 120GB
- 120GB
- Memory bandwidth
- 273GB/s
- 614GB/s
- Storage
- 4TB
- 512GB
- Lowest recorded
- $4,699 in 2d
- $5,099 in 2d
Fit, headroom and speed are computed from each vendor’s published bandwidth and the model’s own size at 8K context. Prices are the cheapest listing we could read on each seller’s page. The arithmetic is here.
Where they actually differ
- Qwen3-235B-A22BWon't fitWon't fit
- DeepSeek-V3Won't fitWon't fit
- Llama-3.3-70BFitsFits
- gpt-oss-120bFitsFits
- Mistral-Large-2411FitsFits
- Llama-4-Scout-17B-16EFitsFits
- Qwen3-32BFitsFits
- Gemma-3-27BFitsFits
- gpt-oss-20bFitsFits
- Llama-4-Maverick-17B-128EWon't fitWon't fit
- Llama-4-BehemothWon't fitWon't fit
Every model we track at Q4_K_M. The rows where the two boxes agree are dimmed, because they are not what you are choosing between.