H200 uses eight 400G compute connections via ConnectX-7; ATOP's main opportunities are 800G OSFP 2×400G DR4 at the DGX port layer and 400G optics in the NDR400 fabric. B200 compute fabric and BlueField-3 storage/management mapping. The Nvidia H200 is the memory-upgraded evolution of the H100, built on the same Hopper architecture but with a significantly expanded memory subsystem. Where the H100 tops out at 80 GB of HBM3, the H200 jumps to 141 GB of HBM3e with 4. As large language models (LLMs) and data-intensive workloads scale, performance is increasingly constrained by data movement rather than raw compute. NVIDIA. The H200 is NVIDIA's first GPU to feature HBM3e memory, which dramatically boosts memory bandwidth and capacity, directly addressing bottlenecks in large-scale AI workloads.