What's the difference between Hopper and Grace Hopper?

Hopper is a GPU architecture powering datacenter GPUs like H100 and H200. Grace Hopper is a Superchip that combines a Grace ARM CPU with a Hopper GPU via NVLink-C2C interconnect. The key difference is that Grace Hopper includes both a CPU and GPU in one package with unified memory access, while Hopper alone refers to just the GPU architecture.