Ascent GX10, GB10 Grace Blackwell, 128GB vs DGX Spark, GB10 Grace Blackwell, 128GB
Both hold gpt-oss-120b at Q4_K_M, and DGX Spark, GB10 Grace Blackwell, 128GB is not meaningfully faster — an est. 44.3 tok/s against 44.3. Buy Ascent GX10, GB10 Grace Blackwell, 128GB and keep the $699.01.
For gpt-oss-120b at Q4_K_MAscent GX10, GB10 Grace Blackwell 128GBDGX Spark, GB10 Grace Blackwell 128GB
- Fit
- Fits
- Fits
- Headroom
- 48GB
- 48GB
- Est. speed
- 44.3 tok/s
- 44.3 tok/s
- Cheapest today
- $3,999.99 at Best Buy
- $4,699 at NVIDIA
- Per GB of memory
- $31
- $37
- Memory
- 128GB unified LPDDR5X memory
- 128GB unified LPDDR5X memory
- Usable for a model
- 120GB
- 120GB
- Memory bandwidth
- 273GB/s
- 273GB/s
- Storage
- 1TB
- 4TB
- Lowest recorded
- $3,999.99 in 2d
- $4,699 in 3d
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
- Qwen3-Coder-480B-A35B-InstructWon't fitWon't fit
- Kimi-K2-InstructWon't fitWon't fit
- GLM-4.6Won't fitWon't fit
- DeepSeek-R1Won't fitWon't fit
- MiniMax-M2Won't fitWon't fit
- Qwen3-30B-A3BFitsFits
- Qwen3-4BFitsFits
- Devstral-Small-2507FitsFits
- Phi-4FitsFits
- Gemma-3n-E4BFitsFits
- Qwen3-VL-8B-InstructFitsFits
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.