you can have part of you model in gpu and other part in RAM. But as far as I know SSD storage is not supported and probably will be much slower than RAM.
partial GPU partial CPU model 3
I would stick to models that completely fit within GPU vram since the cpu operations could be a huge bottleneck since CPUs can’t get nearly as much parallelism as GPUs. Also it could get tricky, loading the model during inference time where some weight tensors are GPU and some are CPU.