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Can H100 80GB SXM5 run Llama-3.3-70B-Instruct?

NVIDIA · 80 GB HBM3 · 3350 GB/s bandwidth · Meta · 70.6B · model ctx up to 128K

✅ Yes — H100 80GB SXM5 (80 GB) can run Llama-3.3-70B-Instruct at Q4 (8K)
VRAM: 53.83 GB needed of 80 GB
Speed: ~30.5 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)
Q44K46.83 GBYes30.5 ± est.
Q48K default53.83 GBYes30.5 ± est.
Q432K95.83 GBNo60.6 ± est.
FP164K149.2 GBNo185.0 ± measured
FP168K default156.2 GBNo185.0 ± measured
FP1632K198.2 GBNo185.0 ± measured

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
Q438.83 GB14.0 GB1 GB53.83 GB80 GB
FP16141.2 GB14.0 GB1 GB156.2 GB80 GB

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