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Can H100 80GB SXM5 run Qwen3.5-35B-A3B?

NVIDIA · 80 GB HBM3 · 3350 GB/s bandwidth · Alibaba · 34.7B (active 3.0B) · MoE · model ctx up to 256K

✅ Yes — H100 80GB SXM5 (80 GB) can run Qwen3.5-35B-A3B at Q4 (8K)
VRAM: 20.16 GB needed of 80 GB
Speed: ~710.6 tok/s (estimated)
SS · ExcellentComposite score: VRAM headroom × 0.5 + tok/s speed × 0.5. Q4 @ 8K context.
CUDA
Estimates from memory-bandwidth formula; rows marked "measured" override. Methodology.

Fit & speed by quant and context

QuantContextVRAM neededFits?tok/s (decode)
Q44K20.12 GBYes710.6 ± est.
Q48K default20.16 GBYes710.6 ± est.
Q432K20.39 GBYes710.6 ± est.
FP164K70.44 GBYes195.4 ± est.
FP168K default70.48 GBYes195.4 ± est.
FP1632K70.7 GBYes195.4 ± 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 neededH100 80GB SXM5 VRAM
Q419.09 GB0.08 GB1 GB20.16 GB80 GB
FP1669.4 GB0.08 GB1 GB70.48 GB80 GB

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