Please select the environment to use as follows on PyTorch official. CUDA 12.6 : https://download.pytorch.org/libtorch/cu126/libtorch-shared-with-deps-2.10.0%2Bcu126 ...
StableSR is capable of achieving arbitrary upscaling in theory, below is an 4x example with a result beyond 4K (4096x6144). # DDIM w/ negative prompts python scripts ...