I still don't think I understand it. I saw those nvfp4 models up by chance yesterday and tried them on my Linux PC with a 5060TI 16gb. Ollama refused to pull them saying they were macOS only.
I assumed it was a meta-data bug and posted an issue, but apparently nvfp4 doesn't necessarily mean nvidia-fp4.
They are nvidia-fp4 weights, but CUDA support isn't _quite_ ready yet, but we've got that cooking.