Inside a computer

Have you ever looked inside a computer system case, or checked out pictures of the inside of one? The small parts may look complex, but the inside of a computer situation isn't really all that mysterious. This leskid will assist you grasp some of the fundamental terminology and understand also a little bit more around what goes on inside a computer system.

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


The motherboard is the computer's primary circuit board. It's a thin plate that holds the CPU, memory, connectors for the difficult drive and optical drives, expansion cards to control the video and audio, and relations to your computer's ports (such as USB ports). The motherboard connects directly or instraight to eexceptionally part of the computer.


The main handling unit (CPU), likewise dubbed a processor, is located inside the computer system case on the motherboard. It is occasionally dubbed the brain of the computer, and also its task is to bring out commands. Whenever before you press a key, click the computer mouse, or start an application, you're sending instructions to the CPU.

The CPU is normally a two-inch ceramic square via a silicon chip situated inside. The chip is commonly around the size of a thumbnail. The CPU fits right into the motherboard's CPU socket, which is extended by the warm sink, an object that absorbs warmth from the CPU.

A processor's speed is measured in megahertz (MHz), or numerous instructions per second; and gigahertz (GHz), or billions of instructions per second. A much faster processor can execute instructions more easily. However before, the actual rate of the computer relies on the speed of many type of different components—not just the processor.

RAM (random access memory)

RAM is your system's temporary memory. Whenever before your computer perdevelops calculations, it temporarily stores the information in the RAM until it is required.

This temporary memory disappears once the computer system is turned off. If you're functioning on a paper, spreadsheet, or various other type of file, you'll should save it to stop losing it. When you conserve a file, the data is created to the difficult drive, which acts as long-term storage.

RAM is measured in megabytes (MB) or gigabytes (GB). The more RAM you have, the more things your computer can execute at the exact same time. If you don't have enough RAM, you might alert that your computer is slow-moving once you have actually several programs open. As such, many type of people include extra RAM to their computer systems to improve performance.

Hard drive

The tough drive is wright here your software program, papers, and also various other documents are stored. The difficult drive is permanent storage, which means the data is still saved also if you revolve the computer system off or unplug it.

When you run a regimen or open a document, the computer system copies some of the information from the hard drive onto the RAM. When you save a paper, the information is duplicated earlier to the difficult drive. The quicker the difficult drive, the quicker your computer system have the right to begin up and also fill programs.

Power supply unit

The power supply unit in a computer system converts the power from the wall outlet to the type of power needed by the computer. It sends out power via cables to the motherboard and other components.

If you decide to open the computer system situation and take a look, make certain to unplug the computer first. Before touching the inside of the computer system, you should touch a grounded steel object—or a steel component of the computer casing—to discharge any kind of static buildup. Static electrical energy can be transmitted through the computer system circuits, which can seriously damage your machine.

Expansion cards

Many computer systems have development slots on the motherboard that enable you to include miscellaneous types of growth cards. These are periodically referred to as PCI (peripheral component interconnect) cards. You might never need to include any PCI cards because most motherboards have integrated video, sound, network-related, and various other capabilities.

However, if you want to increase the performance of your computer system or update the capabilities of an older computer, you deserve to always add one or even more cards. Below are some of the a lot of widespread kinds of growth cards.

Video card

The video card is responsible for what you see on the monitor. Most computer systems have a GPU (graphics processing unit) constructed right into the motherboard rather of having actually a separate video card. If you like playing graphics-extensive games, you deserve to add a faster video card to one of the expansion slots to gain better performance.

Sound card

The sound card—additionally referred to as an audio card—is responsible for what you hear in the speakers or headphones. Many motherboards have incorporated sound, however you have the right to upgrade to a committed sound card for higher-top quality sound.

Netoccupational card

The network-related card allows your computer system to connect over a network and also access the Net. It have the right to either connect with an Ethernet cable or through a wireless link (often called Wi-Fi). Many kind of motherboards have actually built-in netjob-related relations, and a netoccupational card deserve to additionally be added to an expansion slot.

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Bluetooth card (or adapter)

Bluetooth is a technology for wireless communication over brief ranges. It's often used in computer systems to connect via wireless keyboards, mice, and also printers. It's frequently developed right into the motherboard or had in a wiremuch less netjob-related card. For computer systems that don't have Bluetooth, you have the right to purchase a USB adapter, regularly called a dongle.