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PC components and connectors are essential for any computer system, and it’s important to know which ones are compatible with each other.

In this blog post, we’ll discuss the different types of PC components and their corresponding connectors, as well as provide tips on how to choose the right components for your system.

We’ll also cover how to install and configure your components, as well as provide advice on how to avoid common mistakes when installing or configuring PC components. So if you’re looking to upgrade or repair your computer system, this blog is a must-read.

11 Components of Computer Hardware

Computer hardware is a group of components that together make up a computer. It includes the:

Central processing unit

A central processing unit (also known as the processor) is the brain of a computer. It performs the most complex and essential functions of a computer, including processing data, controlling memory, and facilitating communication between other components.

A central processing unit can be located on a motherboard or in a separate circuit board. Depending on the type of computer, it may have one or more processors. A central processing unit is often made up of several microprocessors that work together to perform various functions. These processors are often referred to as cores, with each core designed for specific tasks. In general, the more cores a processor has, the better it will perform. 

The CPU is responsible for executing instructions programmed by the user, controlling processes such as memory management, and processing graphics and audio data.

Processor speed is another factor to consider when choosing a CPU. The higher the speed, the faster your system will run; however, you should also consider other factors such as cost, heat dissipation capabilities, and support.


Motherboards are the central components of a computer’s internal circuitry. They serve as the foundation for the rest of the hardware, providing an interface between the CPU and other components such as RAM and graphics cards. Motherboards can be designed to fit specific needs, ranging from basic to high-end. 

Most motherboards come with integrated processors (known as chipsets), but some may include discrete ones instead. The chipset determines the capabilities of the motherboard, including how many USB ports, SATA connectors, and other features it has. Some motherboards have multiple sockets for adding additional components such as graphics cards or memory. These sockets can be referred to as DIMM slots or PCI/PCIe slots. 

Random Access Memory ( RAM )

Random access memory (RAM) is a type of computer memory that allows information to be read from and written to the memory by using electronic signals called voltage and current.

Computers use RAM to store information and provide fast access to it. Modern computers have multiple levels of RAM, ranging from tiny chips in mobile phones to large DRAM chips in servers, as well as RAM built into the motherboard. The more RAM a computer has, the faster it can process information and run programs.

RAM is made up of several components, including transistors, resistors, capacitors, and other electronic components that work together like a circuit. These components are crafted with specific features that determine how well the chip performs. For example, larger transistors have a higher gain and better current handling capability than smaller ones. A particular chip’s physical size also determines its speed and price.

Video graphics array port

Video graphics array (VGA) port is a standard port found on most personal computers. VGA ports are used to connect monitors or projectors to your computer.

VGA ports use analog signals and can only display images in black and white. But, today, VGA ports are often found on laptops and desktops that have built-in displays, such as the HP Pavilion 14z.

VGA ports are also used for video output in situations where you want to connect a video projector or television set to your computer. The cable that connects VGA ports is called a VGA cable and comes in various lengths, from one foot up to 19 feet. 

Hard drive

A hard drive stores data on one or more physical disks. The disk is physically attached to the computer and contains all of the program files, pictures, music, and videos that the user saves onto it.


A monitor is a component that outputs visual information on a screen. It is one of the most important parts of a computer, as it allows people to view and interact with information on their screen. Monitor components include the screen, the housing, the stand, and additional components such as cables and ports. The size and shape of a monitor can vary depending on its purpose.

 For example, a computer monitor used for watching movies or playing games would be larger than a computer monitor used for work or reading. A basic computer monitor has two parts: the screen and the housing. The former is made up of pixels that display images, and the latter protects them from damage. Other components include cables that connect the monitor to other devices such as computers and televisions, as well as ports through which various types of input devices can be connected.

Power Supply

A power supply is a vital component in any computer. It converts electrical power from a wall outlet into the form needed by the rest of the hardware. The voltage and frequency of the power supply can be adjusted to match the requirements of the computer. Higher voltages and frequencies provide better performance for graphics processing, networking, and other tasks that require higher amounts of power.

A quality power supply will have multiple built-in protections to prevent overvoltage or short-circuit damage to sensitive electronic components. It will also have a sufficient output current to supply the system with adequate power during heavy usage or when the system is inactive for long periods of time. The type of power supply used depends on the overall system requirements and budget.

An efficient power supply has a small size, low energy consumption, and minimal heat generation to ensure low operating costs. A well-built one can be expected to last more than five years without major failures or defects.


Cooling fan

A cooling fan, also known as a heat sink, is a component that helps to dissipate heat from the central processing unit (CPU) and other parts of the hardware. The cooling fan is an open-loop coolant circuit that draws heat away from devices and transfers it to the heat sink. The heat sink then uses conduction and convection to further dissipate the thermal energy. A cooling fan can be designed to spin at a specific speed or RPM, which determines its noise level. Lower RPM fans are usually quieter than higher ones. Higher RPM fans are usually more efficient but can also be louder.

The choice of the cooling fan depends on the user’s preference for noise or efficiency. For example, if a user wants a quiet computer, they might choose a slower speed or lower RPM fan over one that is more efficient but louder. Additionally, users should consider the shape and material of the heat sink when selecting a cooling fan as some look better than others.

Computer mouse

A computer mouse is a small device that allows users to control the computer by moving their fingers on a surface. A computer mouse can have one or more buttons and a scroll wheel. The buttons on a computer mouse are used to navigate through menus, select objects, and execute commands. A scroll wheel enables users to scroll through documents and websites. Some computers come with a built-in mouse while others use an external USB or Bluetooth mouse.

Computers with built-in mice are cheaper than those that require an external mouse. These mice usually have fewer features but can be more affordable than other peripherals such as laser pointers and keyboards. The quality of the mouse can also vary depending on its price and manufacturer. It is essential to purchasing a good quality computer mouse that is compatible with the system.


A keyboard is a critical component of any computer system. It acts as the interface between the user and the computer, allowing for the input of text, commands, and data. A keyboard has keys that correspond with various functions, such as entering letters, numbers, and symbols. The number row on a keyboard acts as a navigation tool for navigating through files and documents. 

Some computers come with a standard keyboard, while others may have specialized keyboards designed for specific tasks. For example, a numeric keypad may be included on a numeric keypad-enabled keyboard to aid in entering numeric information more efficiently. Components such as the processor and RAM determine how fast the computer can run applications and perform tasks and how much memory is needed to store data.

Sound card

A sound card is a hardware device that allows you to play audio files on your computer. It is connected to the audio port of your computer and converts digital signals into analog ones, which can be heard through the speakers. Sound cards come in various shapes and sizes. Some may have integrated amplifiers and speakers, whereas others may have additional external components such as a microphone or headphones jack. Sound cards are often used in gaming systems where high-quality audio is required for immersive gameplay.

A sound card can be useful in a number of situations, such as:

  • Playing music or movies on a stereo system at home or work
  • Replacing an outdated or malfunctioning internal sound chip in a gaming system
  • Adding surround sound capabilities to a computer monitor or TV via an external sound card
  • Reducing noise interference when using wireless headsets with your computer


This blog provides an overview of the different components of a computer, including the CPU, memory, storage, input/output devices, networking, and many more. By understanding these components, you will be able to better understand how a computer works and how to troubleshoot problems when they arise.