Understand the major components and their functions of a computer in one article

When buying or installing a computer, the biggest fear is being discouraged by a bunch of nouns: CPU, motherboard, memory, graphics card, what do they each do? This article explains the main components of a computer in the most straightforward way possible. After reading it, you will understand where the money should be spent and who is usually responsible for the lag.

For easier understanding, you can first think of a computer as a company. CPU is like a boss, responsible for thinking and making decisions; Memory is like the desk next to the boss, storing the things being processed; Hard drives are like a company's archive room, storing all data for a long time; Motherboards are like workstations and wiring in an office, connecting all components together; Graphics card design department, specifically responsible for outputting graphics; Power supply is like a power supply system, the entire company relies on it to operate; The chassis and heat dissipation are like office environment and air conditioning, determining whether the system can work stably.

The central processing unit, also known as the CPU, is the brain of a computer. It is responsible for performing almost all operations and logical judgments, and is the core that determines whether the computer is fast or not. The more cores there are, the more tasks can be processed simultaneously, making it smoother to open multiple programs and render videos; The higher the single core frequency, the faster the single task runs, and games and single threaded software rely more on this. Common manufacturers include Intel's Core series and AMD's Ryzen series. Daily office work mainly depends on whether it is sufficient. When playing games, single core performance is more important, while video and modeling rely more on multi-core capabilities.

The motherboard is the base that connects all accessories. CPU、 Memory, graphics card, and hard drive all need to be plugged into it, so it is more like a transportation hub between accessories. Choosing a motherboard mainly depends on whether the interface matches, such as whether the CPU slot and memory generation are DDR4 or DDR5, and must correspond to other accessories; It also depends on the scalability, such as how many hard drives you want to plug in and whether you need to install an independent network card; Power supply and workmanship are also crucial, as they can affect the stability and overclocking space of the entire machine. The motherboard usually does not directly determine performance, but it determines what accessories you can use.

Memory, also known as RAM, is a temporary workspace. It stores running programs and data, and the web pages you open and the documents you are editing are temporarily stored in memory. The larger the capacity, the more programs can run simultaneously, and the less likely the system is to get stuck. The current mainstream starting capacity is 16GB, and it is recommended to use 32GB for design or gaming. The memory is temporary storage, and the content will disappear after power failure, so the data still needs to be saved to the hard drive. Many lags are related to memory, as opening too many web pages or software can significantly slow down the system when the memory is full.

Hard drives are long-term archives used to store systems, software, and personal files for a long time. Solid state drives, also known as SSDs, are fast, noise free, and vibration resistant, making them suitable for installing systems and commonly used software; Mechanical hard drives, also known as HDDs, have large capacity and low price, making them suitable for storing large files such as movies and backups. The cheapest way to make an old computer run smoothly again is often to replace it with an SSD.

Graphics card, also known as GPU, is responsible for image output. It turns data into visible images on the screen. The core display is built-in to the CPU, sufficient for daily office work and watching videos; Independent graphics cards are more suitable for gaming, editing, 3D modeling, and AI graphics. If you don't play games or cut videos, the graphics card is completely sufficient, and you can also save money and electricity bills.

The power supply, also known as PSU, is a core component that cannot be saved. It converts the mains power into the stable voltage required by various components of the computer. There should be a margin for power, and it is more reliable to choose around 1.5 times the overall power consumption of the machine. You also need to identify reliable brands and 80 PLUS certification, as inferior power supplies may burn out other accessories. The power supply is one of the few components that can affect the entire machine if something goes wrong, so don't cut it to the bottom in the budget.

The chassis and heat dissipation determine the stability guarantee of the system. Chassis affects scalability, wiring, and appearance, as well as air ducts; The heat dissipation is related to the heat control of the CPU and graphics card. When the heat is too high, the hardware will slow down, manifested as jamming, and in severe cases, it may even shut down. The installation circle often says that a configuration that can withstand temperature is the truly reliable configuration.

Peripherals are the part you directly deal with. The monitor, keyboard, mouse, and headphones, although not considered the core of the host, directly determine the user experience. Monitor should consider resolution, refresh rate, and color gamut; Keyboard and mouse depend on the feel and purpose, and there is a significant difference between office and gaming.

When making a purchase, you can summarize it in one sentence. For office and light entertainment, a CPU core display, 16GB of memory, and SSD are sufficient; Gamers should focus on investing in independent graphics cards, high-frequency CPUs, and 32GB of memory; Creative editing is suitable for multi-core CPUs, large memory, and high-capacity SSDs. First, clarify the requirements and then match the accessories, which is more cost-effective and worry free than blindly pursuing high-end models.