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You will see what role each component plays within the computer system. You will also get to understand the features of each component.This section also briefly introduces the different forms of storage devices that we use to hold out data. The motherboard is central to any computer system. The Central Processing Unit (CPU) is the brain of the computer. There are two types of internal memory - RAM and ROM. RAM (Random Access Memory)Graphics cards are hardware devices that plug into the motherboard and enables the computer to display images on the monitor. Sound cards are internal hardware devices that plug into the motherboard. Secondary storage devices are used to store data that is not instantly needed by the computer. There are two categories of storage devices: The video to the right shows how data is read/written to the hard disk drive by spinning a platter across a read/write head.The read/write head is on the end of a movable arm. Input devices are pieces of hardware that get raw data into the computer ready for processing. Input devices fall into two categories:When inputted raw data has been processed it becomes usable information. Output devices are pieces of hardware that send this usable information out of the computer.Some output devices send information out temporarily and some send information out permanently:Note: We will look at output devices in more detail during a later unit! Almost all input and output devices are known as 'Peripheral devices'. Click the above task and complete the diagram of a computer system. Click the above task and follow the instructions given on the sheet. Click the above task and arrange the components into the correct place on the motherboard. var sc_project=8846518; var sc_invisible=1; var sc_security="9c1177a9"; var scJsHost = (("https:" == document.location.protocol) ? "https://secure." : "http://www."); document.write("");
Patrick is a dedicated technology writer who wishes to make the world better by informing individuals who seek more knowledge.The system unit is the box-like case that contains the electronic components of a computer. Many people erroneously refer to this as the CPU. Here you will find devices like the power supply, different drives, the fan, the connectors, and the motherboard. Note that in most cases, the monitor, keyboard, and mouse will not be found inside the system unit layout.Other names for the system unit include the computer chassis, cabinet, box, tower, enclosure, housing, or simply case.These are some of the major components you are going to find inside your system unit. If you are thinking of checking some of these parts out, make sure your computer is powered off and disconnected from a power source. Be careful not to mess with your components if you are not very familiar with them. Before touching anything, be aware of the ESD precautions.The motherboard is sometimes called the system board or main board. It is the main circuit board of a microcomputer. This component contains the connectors for attaching additional boards. All other parts connect in one way or another to the motherboard.This part typically contains the CPU, BIOS, memory, mass storage interfaces, serial and parallel ports, expansion slots, and all the controllers required to control standard peripheral devices, such as the display screen, keyboard, mouse, and disk drive.When you are reading about motherboards, you won't fail to come across the term motherboard form factors, which describes the general shape, the type of case, and the power supply it can use. It also describes the physical organization of the motherboard.A hard disk drive is a high capacity, non-volatile, magnetic data storage device with a volume (disk) that is usually non-removable.Data is magnetically read and written on the platter by read/write heads that float on a cushion of air above the platters.This is a disk drive that can read and write floppy disks, although they are obsolete nowadays.These drives have been replaced by the USB flash disk drives in modern machines.The power supply unit (PSU) is used to convert AC currents from the main supply to the different DC voltages required by various computer components.Power supplies are quoted as having a certain power output specified in watts, A standard power supply would typically be able to deliver around 350 watts. You will need more power from the power supply if your PC has more operating components.This is a high capacity optical data storage device with a removable disk. It writes data onto or reads data from a storage medium.A CD-ROM drive may be connected to the computer via an IDE (ATA), SCSI, S-ATA, Firewire, or USB interface or a proprietary interface.© 2010 Patrick Kamauby William Cobb2by Jason Ponic137by Guilherme Radaeli3by Alfred Amuno13by Tobias44by Tobias11by Jason Ponic137Sign in or sign up and post using a HubPages Network account.No HTML is allowed in comments, but URLs will be hyperlinked. Comments are not for promoting your articles or other sites.imee zuasola 6 weeks ago thank you for posting the parts of the system unit!!!!Patrick Kamau 12 months ago from Nairobi, KenyaThank you Ziel for the visit and comment. I am happy that you have found the content of this hub useful. Keep reading!Patrick Kamau 5 years ago from Nairobi, Kenyaeunice, you are welcome. Thanks for reading and commenting.eunice 5 years ago thaks for the knowledgePatrick Kamau 5 years ago from Nairobi, KenyaThanks Mohamed Dhidha. I like enlightening people about computers. There is a lot to learn from the computer world.Mohamed Dhidha 5 years ago The information was presented in a very good format, very interesting and very helpful. Thank you so much.Patrick Kamau 5 years ago from Nairobi, KenyaYou are welcome chrysann Evans. It my pleasure to find that you are contented by what I am offering here.chrysann Evans 5 years ago thanks for your helpPatrick Kamau 5 years ago from Nairobi, KenyaThanks Abrabanj, for going through this useful information. There is a lot to learn in the computer world.Abrabanj 5 years ago A nice and very good expression system unitPatrick Kamau 5 years ago from Nairobi, KenyaThanks AMUZU for reading and commenting.AMUZU 5 years ago well donePatrick Kamau 6 years ago from Nairobi, KenyaThank you stasheen brown for dropping by, check more of my hubs for a lot of helpful information.stasheen brown 6 years ago thank you for all the information. very helpful :)Copyright © 2017 HubPages Inc. and respective owners. Other product and company names shown may be trademarks of their respective owners. HubPages® is a registered Service Mark of HubPages, Inc. HubPages and Hubbers (authors) may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.Copyright © 2017 HubPages Inc. and respective owners.