At the heart of this evolution lie two foundational components: server chassis (the physical enclosures that house server components) and rack units (U) (the standardized unit of measurement for rack-mounted equipment).

A server chassis keeps all the main server parts safe. It holds things like the motherboard, drives, and power supply. A rack unit, called "U," shows how tall a server chassis is.

the server chassis is designed for "high-intensity work" and is suitable for enterprises and data centers; ordinary chassis are small and convenient, suitable for home or office scenes.

In the era of artificial intelligence and big data, an AI Server is a core hardware platform that supports deep learning, image recognition, and natural language processing. Unlike traditional servers, AI Servers integrate GPU/TPU accelerator cards, high memory bandwidth, and high-speed interconnect technology to enable model training and inference with hundreds of billions of parameters.