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Can H200 141GB SXM5 run Qwen3.5-27B?

NVIDIA · 141 GB HBM3e · 4800 GB/s bandwidth · Alibaba · 27.0B · model ctx up to 256K

Yes — the H200 141GB SXM5 (141 GB HBM3e) can run Qwen3.5-27B. At Q4 with the default 8K context it needs ≈ 21.25 GB VRAM (weights 14.85 GB + KV cache 5.4 GB + 1 GB runtime overhead), which fits within 141 GB. Decode at Q4/8K: ≈ 113.1 tok/s (estimated, batch 1). FP16 (≈ 60.4 GB) also fits, at ≈ 31.1 tok/s (estimated). Estimates come from memory-bandwidth math; rows tagged measured override estimates. Relative ranking is more reliable than absolute tok/s. Methodology.

Fit & speed by quant and context

QuantContextVRAM neededFits?tok/s (decode)
Q44K18.55 GBYes113.1 est.
Q48K default21.25 GBYes113.1 est.
Q432K37.45 GBYes113.1 est.
FP164K57.7 GBYes31.1 est.
FP168K default60.4 GBYes31.1 est.
FP1632K76.6 GBYes31.1 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 neededH200 141GB SXM5 VRAM
Q414.85 GB5.4 GB1 GB21.25 GB141 GB
FP1654.0 GB5.4 GB1 GB60.4 GB141 GB

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