Crucial Parts Inside A Computer

Computer components are as various as they are numerous. You’ll find everything from mainboards to mice and keyboards. In this article, you’ll learn about the most crucial parts inside of a computer—and how they all work together to make your computer run smoothly.

What Is A Computer Component?

The mainboard is the heart of your computer. It’s where the processor and graphics card are connected, and where the BIOS, Operating System, and all the hardware components are installed. You’ll often find user-installable applications and drivers are stored onboard the mainboard, as well as the operating system. The CPU is the brains of your computer, responsible for scientific and technical computations. It’s what actually “runs” your computer. Like the mainboard, the CPU is also user-installable.


The mainboard is what actually makes the computer run. It contains all the important hardware components such as the processor, memory, drive, and so on. You’ll find the mainboard’s pins and plugs are often labeled, along with the functions of each component. You’ll also find the mainboard comes with the computer pre-installed, but if you purchase a new computer, you’ll likely remove the old one and install the new one on the new mainboard.


The CPU is the brains of your computer, responsible for scientific and technical computations. It’s what actually “runs” your computer. Like the mainboard, the CPU is also user-installable. The CPU runs at a specific speed and voltage dependent on the need of the task—more on this later. It also has a clock speed and temperature limit that may affect the performance of your computer. Manufacturers use different types of CPUs in their machines. You’ll often see an unlocked “K” or “Intel” CPU in modern consumer laptops.

Memory Card

The memory card is the storage device that contains your operating system (OS), applications, and data. You might have up to an internal memory card and an external SD card (“SD” card) that come with every laptop or desktop. It comes pre-installed with Windows, but you can easily remove and install other OSs as well. You can also remove and install applications and user-installable drivers from the card.

Disk Drive

The disk drive houses a variety of storage devices such as your OS, applications, and data. It can also be used to read and write data. A 5400 RPM disk drive is commonly used in desktops and laptops.


The monitor is what allows you to see what’s on your computer. You might have one or several monitors connected to your computer. A monitor’s job is to display what’s on the computer’s screen. There are many different types of monitors, each with its own purpose. Monitors come in a variety of sizes and resolutions, allowing you to see what your computer is working with. You’ll often see monitors with a “flat” or “panoramic” screen—ones that “pan” the entire screen to offer a 360-degree view. A “tiled” or “split” screen monitors display data in two or more separate views.


The keyboard is what you use to control your computer. It’s often located on the front or top of the computer, but may be integrated into the monitor. There are many different types of keyboards, including those with number pad, virtual numbers, and other features. Some keyboards have a “click” sound when you press the “Enter” key, making it easy to recognize and respond to messages and emails. Some manufacturers have even added “Laptop-style” keys to their keyboards, allowing you to easily “cut the cord” and connect to a laptop via a USB or Bluetooth connection.


When it comes to computers, there are many different types including desktops, laptops, and servers. The most common components inside of a computer are the CPU, the RAM, the Hard Drive, and the Monitor. You’ll often see these components in computers together, but they can be found individually as well. The key to a great computer experience is finding the right components for your computer. By following this guide, you’ll be well on your way to installing the best computer.

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