Decoding GPU Server Topologies: From PCIe to NVLink for Large‑Model Training

This article provides a detailed technical overview of modern multi‑GPU server architectures—including PCIe switches, NVLink, NVSwitch, and HBM—explaining their hardware topologies, bandwidth characteristics, monitoring methods, and network choices to help engineers design efficient AI training clusters.

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Decoding GPU Server Topologies: From PCIe to NVLink for Large‑Model Training