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Can DGX Spark (GH200 480GB) run qwen35b-a3b-fable-sft-abliterated?

NVIDIA · 480 GB LPDDR5X · 500 GB/s bandwidth · hotdogs · 34.7B (active 3.0B) · MoE · model ctx up to 32K

SS · ExcellentComposite score: VRAM headroom × 0.5 + tok/s speed × 0.5. Q4 @ 8K context.
CUDA

Yes — the DGX Spark (GH200 480GB) (480 GB LPDDR5X) can run qwen35b-a3b-fable-sft-abliterated. At Q4 with the default 8K context it needs ≈ 20.69 GB VRAM (weights 19.09 GB + KV cache 0.6 GB + 1 GB runtime overhead), which fits within 480 GB. Decode at Q4/8K: ≈ 106.1 tok/s (estimated, batch 1). FP16 (≈ 71.0 GB) also fits, at ≈ 29.2 tok/s (estimated). Estimates come from memory-bandwidth math; rows tagged measured override estimates. Relative ranking is more reliable than absolute tok/s. Methodology. Buy DGX Spark (GH200 480GB) on Amazon →

Fit & speed by quant and context

QuantContextVRAM neededFits?tok/s (decode)
Q44K20.39 GBYes106.1 ± est.
Q48K default20.69 GBYes106.1 ± est.
Q432K22.49 GBYes106.1 ± est.
FP164K70.7 GBYes29.2 ± est.
FP168K default71.0 GBYes29.2 ± est.
FP1632K72.8 GBYes29.2 ± est.

Fits = weights + KV(ctx) + 1 GB overhead ≤ 95% of VRAM. Measured anchors are context-agnostic; the fit verdict is recomputed per context. A missing tok/s means the model is far beyond this card (offload-only territory).

VRAM breakdown at 8K context

QuantWeightsKV cacheOverheadTotal neededDGX Spark (GH200 480GB) VRAM
Q419.09 GB0.6 GB1 GB20.69 GB480 GB
FP1669.4 GB0.6 GB1 GB71.0 GB480 GB

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