eed to use a previous version of PyTorch, then we recommend installing xFormers from the source. After xFormers is installed, you can use enable_xformers_memory_efficient_attention() for faster inference and reduced memory consumption as shown in this section. According to this issue, xFormers v0.0.16 cannot be used for training (fine-tune or DreamBooth) in some GPUs. If you observe this problem, please install a development version as indicate