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Can H100 80GB SXM5 run Qwen3.5-122B-A10B?

NVIDIA · 80 GB HBM3 · 3350 GB/s bandwidth · Alibaba · 122.0B (active 10.0B) · MoE · model ctx up to 256K

✅ Yes — H100 80GB SXM5 (80 GB) can run Qwen3.5-122B-A10B at Q4 (8K)
VRAM: 68.35 GB needed of 80 GB
Speed: ~213.2 tok/s (estimated)
BB · GoodComposite 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)
Q44K68.23 GBYes213.2 ± est.
Q48K default68.35 GBYes213.2 ± est.
Q432K69.1 GBYes213.2 ± est.
FP164K245.12 GBNo17.8 ± est.
FP168K default245.25 GBNo17.8 ± est.
FP1632K246.0 GBNo17.7 ± 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
Q467.1 GB0.25 GB1 GB68.35 GB80 GB
FP16244.0 GB0.25 GB1 GB245.25 GB80 GB

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