What Makes a Server Different from a PC? A Deep Dive into Server Hardware and Architecture

1. Server

1.1 Server vs PC

Most programmers encounter cloud servers from providers like Alibaba Cloud and Tencent Cloud, but this article focuses on physical servers rather than cloud instances. In school, teachers may refer to computers as servers, prompting a comparison between PC servers and dedicated servers.

Physical servers differ from PCs in form factor: servers lack direct terminals, while PCs have monitors. Servers offer greater security, expandable storage, graphics, and network cards, and operate 24/7, unlike PCs.

Operating a server typically requires Linux, whereas PCs run Windows. Interaction with a PC is through peripherals and a GUI, while servers are managed remotely via tools like SecureCRT, issuing shell commands to control the Linux kernel and hardware. PC applications use the Windows API to interact with the kernel, a process known as a system call .

2. Server Classification

2.1 Appearance Classification

Servers can be categorized by form factor. The company's servers are rack-mounted using Inspur/AMD motherboards . Their business involves big‑data cloud services, cloud desktops, and cloud products, requiring high‑performance servers for virtualization and data processing.

Server height is measured in units (U), where 1 U = 4 cm. The example shows an 8 U server positioned 32 cm from the bottom of the rack.

2.2 Architecture Classification

Based on instruction set architecture, servers are divided into:

CISC (Complex Instruction Set Computing) – commonly referred to as x86 servers , using Intel or AMD CPUs.

RISC (Reduced Instruction Set Computing) – based on ARM, MIPS, or Power architectures. ARM chips are produced by companies such as Huawei and are used in Apple’s M1.

3. Server Appearance

Servers are classified by height (U) and come in two main visual categories.

3.1 Front Panel

3.2 Rear Panel

ILO ports and IPMI ports serve the same purpose. ILO is HP’s remote management port, while IPMI is the generic remote management interface.

4. Internal Components

4.4 Server Internal Composition

The internal components of a server are similar to those of a PC, but servers uniquely include a RAID card.

The RAID card is shown below:

5. Server Parameters

The following aspects are commonly used to describe server specifications:

Brand

Model

Serial Number (SN)

Asset Number (PN)

Configuration

5.1 Server Brand

The company's servers are from Inspur.

5.2 Server Serial Number (SN)

The SN uniquely identifies a server and can be used to retrieve all its information.

5.3 Asset Number (PN)

PN is defined internally by manufacturers for asset management and automated operations.

5.4 Server Configuration

Configuration decisions are typically made by architects and procurement teams.