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# Faster Diffusion on Blackwell: MXFP8 and NVFP4 with Diffusers and TorchAO – PyTorch

**[PyTorch](https://daily.dev/sources/pytorch)** · 12 min read · 0 upvotes · 0 comments

## Summary

MXFP8 and NVFP4 microscaling quantization formats natively supported by NVIDIA's Blackwell architecture (B200 GPUs) deliver significant inference speedups for diffusion models. Using diffusers and TorchAO, benchmarks on Flux.1-Dev, QwenImage, and LTX-2 show up to 1.26x speedup with MXFP8 and up to 1.68x with NVFP4 compared to BF16 baselines, while also reducing peak memory by up to ~3.5x. The post covers selective quantization strategies (skipping small or accuracy-critical layers), CUDA Graphs via torch.compile reduce-overhead mode to cut CPU overhead at small batch sizes, and LPIPS as a perceptual accuracy metric. Code and reproducible recipes are provided for all three models.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://pytorch.org/blog/faster-diffusion-on-blackwell-mxfp8-and-nvfp4-with-diffusers-and-torchao/>

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