Architects' Tech Alliance

Sep 15, 2025 · Artificial Intelligence

Why NVLink Beats PCIe for AI Training: A Deep Dive into GPU Interconnects

This article examines the differences between Scale‑Out and Scale‑Up networking in AI compute clusters, comparing PCIe, Ethernet, InfiniBand, NVLink, UALink, and emerging standards like UB‑Mesh, and explains how each technology impacts bandwidth, latency, scalability, and cost for large‑scale model training.