Inside a computer

Have you ever before looked inside a computer system case, or seen pictures of the within of one? The small parts may look complicated, yet the inside of a computer instance isn't yes, really all the mysterious. This lesson will assist you understand some that the an easy terminology and also understand a bit much more about what goes on inside a computer.

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Watch the video below to learn around what's inside a desktop computer computer.


The motherboard is the computer's main circuit board. It's a slim plate the holds the CPU, memory, connectors because that the hard drive and optical drives, expansion cards to control the video clip and audio, and connections to her computer's harbor (such together USB ports). The motherboard connects directly or indirect to every component of the computer.


The central processing unit (CPU), additionally called a processor, is situated inside the computer case ~ above the motherboard. It is sometimes referred to as the mind of the computer, and its job is to bring out commands. At any time you push a key, click the mouse, or start an application, you're sending out instructions come the CPU.

The CPU is typically a two-inch ceramic square v a silicon chip located inside. The chip is usually about the size of a thumbnail. The CPU fits right into the motherboard's CPU socket, i beg your pardon is extended by the heat sink, an object that absorbs warmth from the CPU.

A processor's speed is measure in megahertz (MHz), or millions of instructions per second; and also gigahertz (GHz), or billions the instructions every second. A much faster processor deserve to execute instructions much more quickly. However, the actual rate of the computer system depends on the speed of many different components—not just the processor.

RAM (random accessibility memory)

RAM is her system's short-term memory. Whenever your computer performs calculations, it temporarily shop the data in the RAM till it is needed.

This short-term memory disappears as soon as the computer is turn off. If you're functioning on a document, spreadsheet, or other kind of file, you'll must save it to avoid shedding it. When you conserve a file, the data is composed to the hard drive, which acts together long-term storage.

RAM is measure in megabytes (MB) or gigabytes (GB). The more RAM girlfriend have, the much more things your computer can carry out at the exact same time. If girlfriend don't have enough RAM, you may an alert that your computer is sluggish when you have actually several programs open. Due to the fact that of this, many people add extra RAM to their computers to boost performance.

Hard drive

The hard drive is whereby your software, documents, and also other files are stored. The tough drive is long-term storage, which means the data is still saved also if you turn the computer system off or unplug it.

When you run a regime or open up a file, the computer system copies some of the data native the hard drive ~ above the RAM. As soon as you save a file, the data is copied ago to the hard drive. The faster the tough drive, the faster your computer can start up and load programs.

Power it is provided unit

The strength supply unit in a computer system converts the power from the wall surface outlet to the type of power necessary by the computer. It sends power v cables come the motherboard and other components.

If you decision to open up the computer case and take a look, make sure to unplug the computer first. Before touching the within of the computer, you need to touch a grounded steel object—or a metal component of the computer casing—to discharge any kind of static buildup. Static power can be transmitted v the computer circuits, which deserve to seriously damages your machine.

Expansion cards

Most computer systems have expansion slots top top the motherboard that permit you to add various species of expansion cards. These space sometimes dubbed PCI (peripheral ingredient interconnect) cards. You might never require to include any PCI cards due to the fact that most motherboards have built-in video, sound, network, and also other capabilities.

However, if you desire to rise the performance of your computer or update the capabilities of an enlarge computer, you deserve to always add one or an ext cards. Below are few of the many common types of expansion cards.

Video card

The video card is responsible because that what girlfriend see top top the monitor. Most computer systems have a GPU (graphics processing unit) built into the motherboard rather of having a separate video card. If you like playing graphics-intensive games, friend can include a faster video clip card to one of the expansion slots to get much better performance.

Sound card

The sound card—also referred to as an audio card—is responsible because that what friend hear in the speakers or headphones. Most motherboards have integrated sound, however you can upgrade to a dedicated sound map for higher-quality sound.

Network card

The network card permits your computer to interact over a network and access the Internet. It have the right to either connect with an Ethernet cable or with a wireless link (often referred to as Wi-Fi). Plenty of motherboards have built-in network connections, and a network map can likewise be included to an growth slot.

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Bluetooth card (or adapter)

Bluetooth is a modern technology for wireless communication over short distances. It's regularly used in computers to interact with wireless keyboards, mice, and also printers. It's commonly developed into the motherboard or included in a wireless network card. For computer systems that don't have actually Bluetooth, you can purchase a USB adapter, often called a dongle.