NVLink

An in-depth guide to distributed training architectures like DDP, FSDP, and ZeRO, and why hardware topology—specifically GPU wiring—is the silent killer of training performance.

Nvidia's massive $4 billion investment in Lumentum and Coherent signals a strategic shift toward optical interconnects to solve the IO bottleneck in next-generation AI data centers.

A technical deep dive into how GPUs communicate during AI model training, covering PCIe, NVLink, NCCL, and the infrastructure required for models like DeepSeek-V3.