Mlx Community Gpt Oss 20B Mxfp4 Q8 speed on NVIDIA H100 SXM5 80GB and quantization-level VRAM fit.
NVIDIA H100 SXM5 80GB meets the minimum VRAM requirement for Q4 inference of Mlx Community Gpt Oss 20B Mxfp4 Q8. Review the quantization breakdown below to see how higher precision settings impact VRAM and throughput.
NVIDIA H100 SXM5 80GB can run Mlx Community Gpt Oss 20B Mxfp4 Q8 with Q4 quantization. At approximately 272 tokens/second, you can expect Excellent speed - conversational response times under 1 second.
You have 70GB headroom, which is sufficient for system overhead and smooth operation.
| Quantization | VRAM needed | VRAM available | Estimated speed | Verdict |
|---|---|---|---|---|
| Q4 | 10GB | 80GB | 272.29 tok/s | ✅ Fits comfortably |
| Q8 | 20GB | 80GB | 190.60 tok/s | ✅ Fits comfortably |
| FP16 | 40GB | 80GB | 103.47 tok/s | ✅ Fits comfortably |
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NVIDIA H100 SXM5 80GB can run Mlx Community Gpt Oss 20B Mxfp4 Q8 at Q4 with an estimated 272 tok/s.
Q4 inference is estimated to need about 10GB VRAM on this page, while NVIDIA H100 SXM5 80GB has 80GB available.
If you need more speed or context headroom, compare alternative GPUs below and check higher-tier VRAM options.