Bought a 5070 Ti, 5080, or 5090 and ComfyUI won't start? Here's exactly what's different and how to fix it.
You just spent a fortune on an RTX 50-series card. ComfyUI won't start. This is one of our most common remote fix cases.
The entire stack that worked for 30/40 series doesn't work for 50 series.
nvidia-smipip install torch==2.9.1 torchvision==0.24.1 torchaudio==2.9.1 --index-url https://download.pytorch.org/whl/cu130| Problem | Fix |
|---|---|
| SageAttention won't compile | --use-pytorch-cross-attention |
| Nunchaku fails | Use pre-built wheel |
| xformers crashes | Skip it — built-in attention works |
We've fixed dozens of 50-series setups — book a session, typically 30 min. Full matrix: GPU Compatibility.
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