DGX Spark, GB10 Grace Blackwell, 128GB vs Ascent GX10, GB10 Grace Blackwell, 128GB
Neither box holds DeepSeek-V3 at Q5_K_M, at any quant we compute. This pair is the wrong pair for this model.
- Fit
- Won't fit
- Won't fit
- Headroom
- −357GB
- −357GB
- Est. speed
- —
- —
- Cheapest today
- $4,699 at NVIDIA
- $3,999.99 at Best Buy
- Per GB of memory
- $37
- $31
- Memory
- 128GB unified LPDDR5X memory
- 128GB unified LPDDR5X memory
- Usable for a model
- 120GB
- 120GB
- Memory bandwidth
- 273GB/s
- 273GB/s
- Storage
- 4TB
- 1TB
- Lowest recorded
- $4,699 in 2d
- $3,999.99 in 1d
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 Q5_K_M. The rows where the two boxes agree are dimmed, because they are not what you are choosing between.