Can H200 141GB SXM5 run gpt-oss-20b?

NVIDIA · 141 GB HBM3e · 4800 GB/s bandwidth · OpenAI · 21.5B (active 3.6B) · MoE · model ctx up to 128K

Yes — the H200 141GB SXM5 (141 GB HBM3e) can run gpt-oss-20b. At Q4 with the default 8K context it needs ≈ 13.55 GB VRAM (weights 11.83 GB + KV cache 0.72 GB + 1 GB runtime overhead), which fits within 141 GB. Decode at Q4/8K: ≈ 848.5 tok/s (estimated, batch 1). FP16 (≈ 44.72 GB) also fits, at ≈ 233.3 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

Quant	Context	VRAM needed	Fits?	tok/s (decode)
Q4	4K	13.19 GB	Yes	848.5 est.
Q4	8K default	13.55 GB	Yes	848.5 est.
Q4	32K	15.71 GB	Yes	848.5 est.
FP16	4K	44.36 GB	Yes	233.3 est.
FP16	8K default	44.72 GB	Yes	233.3 est.
FP16	32K	46.88 GB	Yes	233.3 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

Quant	Weights	KV cache	Overhead	Total needed	H200 141GB SXM5 VRAM
Q4	11.83 GB	0.72 GB	1 GB	13.55 GB	141 GB
FP16	43.0 GB	0.72 GB	1 GB	44.72 GB	141 GB

Other GPUs that run gpt-oss-20b

• B200 192GB SXM — ≈1414.1 tok/s Q4 est.
• MI300X 192GB — ≈936.9 tok/s Q4 est.
• H100 80GB SXM5 — ≈592.2 tok/s Q4 est.
• Gaudi 3 128GB — ≈579.1 tok/s Q4 est.
• A100 80GB SXM4 — ≈360.4 tok/s Q4 est.
• RTX 5090 32GB — ≈282.5 tok/s Q4 measured
• RTX 4090 24GB — ≈225.2 tok/s Q4 measured
• RTX 5080 16GB — ≈204.9 tok/s Q4 measured

All GPUs for gpt-oss-20b →

Other models for the H200 141GB SXM5

• Qwen3-0.6B — ≈3818.2 tok/s Q4 est.
• gemma-3-1b-it — ≈3054.5 tok/s Q4 est.
• Llama-3.2-1B-Instruct — ≈2545.5 tok/s Q4 est.
• Qwen3-1.7B — ≈1527.3 tok/s Q4 est.
• Qwen3-30B-A3B — ≈1018.2 tok/s Q4 est.
• Qwen3-Coder-30B-A3B-Instruct — ≈1018.2 tok/s Q4 est.
• GLM-4.7-Flash — ≈1018.2 tok/s Q4 est.
• Qwen3-30B-A3B-Instruct-2507 — ≈1018.2 tok/s Q4 est.

All models on the H200 141GB SXM5 →