Upgrading to PyTorch 2.13 and CUDA 13 Doubles Video Resolution on Blackwell GPUs
Chemical-Bicycle3240 · reddit · 2026-08-09
For users running Blackwell architecture GPUs like the RTX 50-series, upgrading to PyTorch 2.13 and CUDA 13 offers massive performance gains.
Benchmark data for generating a 7-second video using Turbo LoRA with specific attention mechanisms shows:
- Old Environment (PyTorch 2.9 + CUDA 12.8): Took 240 seconds for a 0.6-megapixel render.
- New Environment (PyTorch 2.13 + CUDA 13): Takes the same 240 seconds, but doubles the output to 1 megapixel.
The author notes that while upgrading might break some legacy ComfyUI custom node dependencies, the massive boost in resolution throughput makes it absolutely worth the jump.
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