What Is a Server CPU?

Updated on Dec 7, 2023 by

FS Rack Servers

In the current era dominated by compute-intensive applications like big data, AI, and IoT, high-performance servers play a crucial role in driving digital transformation for enterprises. Maximizing the benefits of servers requires a careful alignment of various critical components. Among these, the CPU (Central Processing Unit) stands out as a core element and serves as the primary determinant of server performance.

This article aims to provide you with a comprehensive overview of server CPUs, enhancing your understanding of their fundamental aspects.

What Is a Server CPU?

The server CPU, or server processor, serves as a crucial component responsible for processing instructions and commands within a server. Its role encompasses tasks such as retrieving and executing instructions, processing data, and undertaking various computational functions like serving web pages and executing database queries. As the linchpin of server functionality, the CPU plays a pivotal role in determining the computing capabilities of servers. The responsiveness and overall performance of a server are heavily influenced by the efficiency of its CPU.

Server CPU

How Does a Server CPU Work?

The functionality of a server CPU involves executing data processing, storing operations, and handling input/output (I/O) operations through mathematical and logical calculations. The process can be broken down into four fundamental steps:

Fetch: The CPU retrieves instructions from memory, interprets them, and determines the next operation to be performed.

Decode: All instructions or commands undergo translation into assembly instructions. During this stage, the server CPU decodes the assembly code, converting it into understandable binary instructions.

Execute: The CPU carries out instructions using calculations and technical algorithms, producing processed data as output.

Store: Following the execution of instructions, the CPU stores the output data back into the memory. This sequence of operations forms the core functioning of a server CPU, enabling it to process and manage data effectively.

Essential Components of Influencing Server CPU Performance

The efficiency of a server is intricately tied to the performance of its CPU. Several key factors influence the basic features and functionalities of a server CPU, shaping its overall capabilities.

Number of Processors

The quantity of processors in a server holds substantial sway over its performance. The greater the number of processors, the swifter and more proficient the server becomes. Multiple processors empower the server to execute a higher volume of instructions concurrently, enabling the CPU to manage more intensive workloads within the same timeframe.

Network servers commonly exhibit varying processor counts, with single-processor and dual-processor servers being prevalent in both small and large workloads. Single-processor servers are aptly suited for small to medium workloads, while dual-processor servers, with augmented processor speed and RAM, deliver heightened performance and stability, especially under demanding workloads.

CPU Socket

The server CPU socket serves as the crucial link between the CPU processor and the motherboard. It ensures the precise insertion of the CPU's circuit chip. The CPU socket facilitates seamless replacement of the server CPU while safeguarding against damage during insertion or removal.

The count of CPU sockets in a server aligns with the number of CPUs that can be installed. Typically, servers support 1/2/4/8/16/32 CPU sockets. A single-socket server accommodates a solo processor, while a 4-socket server can concurrently run 4 processors. The prevailing perception is that 2-socket servers cater to a significant portion of the SMB market, while 4-socket servers are positioned in the mid to high-end market segments.

CPU Cores

A server CPU core is a tangible component vital to its functioning. Multi-core processors possess the ability to execute a greater number of instructions within the same timeframe. Furthermore, these processors facilitate smoother program execution and demand less power, thereby significantly enhancing server performance.

An Intel Xeon Scalable server processor typically features 8 to 32 cores. Additionally, processors with more or fewer cores are available for diverse application scenarios. While a higher count of CPU cores generally signifies enhanced performance, determining the optimal number of CPU cores hinges on the specific requirements of your IT environment and workloads.

CPU Threads

What is threading in CPU? It constituting sets of instructions or code for concurrent programming execution, play a pivotal role in server CPU performance. A single server CPU core can support 2 threads. In the scenario of an 8-core CPU with two threads per core, the CPU boasts 16 threads for task execution.

Multithreading empowers a CPU to run multiple threads of code concurrently, handling concurrent tasks within a process simultaneously. Threads wield significant influence over server CPU performance, particularly in determining the server's operational capacity within a specified timeframe. In scenarios involving resource-intensive processes, a CPU with numerous threads is preferable.

CPU Brands

In the realm of server CPUs, several renowned brands are widely recognized for their exceptional processing performance, advanced manufacturing technologies, and reliability. Here are some highly acclaimed brands in the server CPU space:


Intel stands as a global leader in semiconductor and computing technology innovation. Its Xeon series of server processors is one of the most popular choices in the industry. The Xeon processors are known for their robust multicore performance, high scalability, and architecture optimized for server workloads.


Advanced Micro Devices (AMD) is another company making a significant impact in the server CPU market. The EPYC series of server processors from AMD has gained praise for outstanding performance, a high number of cores, and advanced security features. AMD server CPU focus on providing performance while emphasizing energy efficiency and cost-effectiveness.

IBM Power Systems

IBM's Power Systems series CPUs are designed to meet enterprise-level computing needs. These processors employ a unique architecture, providing robust support for large-scale data processing and high-performance computing. IBM's processors excel in handling complex workloads.


While ARM CPU architecture is widely popular in the mobile device space, it is gradually entering the server market. Some manufacturers adopt ARM architecture to design server CPUs, offering high energy efficiency and adaptability, especially suitable for cloud computing and edge computing scenarios.

These renowned brands represent leaders in the server CPU domain, driving technological advancements and meeting the high demands for processing performance and reliability in various application scenarios. When choosing server CPUs, enterprises and data centers often consider products from these brands to meet their specific requirements.

The Closing Thought

The aforementioned elements form the foundation for the enduring reliability of server CPUs, empowering them to seamlessly manage diverse tasks, enhance speed, and ensure steadfast reliability over extended periods. When contemplating the acquisition of a server, exercise due diligence in selecting its pivotal components. Tailor your choice of server processors and CPU cores to align with the specific demands of your IT environment and workload.

You might be interested in

See profile for Howard.
Deep Comparison Between Server CPU and GPU
Jun 1, 2022
See profile for Sheldon.
Decoding OLT, ONU, ONT, and ODN in PON Network
Mar 14, 2023
See profile for Irving.
What's the Difference? Hub vs Switch vs Router
Dec 17, 2021
See profile for Sheldon.
What Is SFP Port of Gigabit Switch?
Jan 6, 2023
See profile for Migelle.
PoE vs PoE+ vs PoE++ Switch: How to Choose?
Mar 16, 2023