Tech Mar 18, 2026 updated 8 min ComfyUI on Blackwell GPUs (RTX 5090 / RTX PRO 6000): why sm_120 fails and the PyTorch Nightly fix that works Why ComfyUI breaks on NVIDIA Blackwell (sm_120) GPUs with 'no kernel image is available for execution' errors, and a working setup using PyTorch Nightly, xformers removal, SageAttention, and NVFP4 quantization. Tested on RTX PRO 6000 Blackwell. ComfyUI NVIDIA GPU Blackwell Image Generation
