Video card - Sample Essay
USER REQUIREMENT: I am setting up a computer for an AVCE (Advanced Vocational Certificate Education) ICT student. This computer would be used for the following: Researches To communicate with family and friends via email and chat rooms Preparation of coursework Here is a list of some hardware and software devices, which I would use to set up my system for my suitable user. Hardware Main processor CPU (central processing Unit) Motherboard Ports Sound card Video card Output Devices Printer Monitor Speakers Input Devices Mouse Keyboard Scanner Storage Devices Disk drives.
Hard disks CD -ROM drive (RICOH MP 5240 DVD+RW KIT) Floppy disk drive Table with Products and Prices List of products and prices that would be used for the system. Part Type Speed Size Price Hard Drive 5400rpm i?? 91. 68 Monitor HEWLETT PACKARD- TFT MONITOR 15″ i?? 279. 99 Printer HEWLETT PACKARD LJ1010 LASER PRINTER, 600 x 600 dpi Resolution- 23 Pages Per Minute i?? 99. 99 CPU Celeron Inc. Fan 2. 0GHz i?? 91. 68 Memory PC900 RAM,DDR(up to DDT400) 515MB i?? 49. 35 Mouse Microsoft Trackball Optical PS2/USB CD RW RICOH MP 5240 DVD+RW KIT i?? 39. 99 Motherboard MSI KT4 Ultra-FISR.
i?? 89. 30 Sound card Model – CREATIVE LABS SOUNDBLASTER i?? 34. 99 Speakers PACKARD BELL 2. 1 FLAT PANEL, 2 x Satellites, 1 x Subwoofer, 10 Watts RMS, Wired Remote control, Ultra thin, Uses NXT technology. 10watts RMS i?? 29. 99 Scanner CANON LIDE 80, Up to 2400 x 4800 dpi resolution, Up to 48 bit depth, One-touch scanning buttons, Z-Lid for scanning thick documents, USB Interface, Software included, Windows and MAC compatible, 500 mm Width usb2 high speed i?? 99. 99 Anti-Virus Norton Antivirus 8. 0 Removes viruses automatically Cleans infected Internet and email downloads.
Automatic updating defends against new viruses 24 MB RAM i?? 105 Application Software The various types of application software include Database E-mail Spreadsheet Word processing Utilities, such as Virus checkers (Norton Antivirus 8. 0) Software Operating system (Windows XP) Microsoft PowerPoint Microsoft Word Microsoft Excel Microsoft FrontPage Microsoft Access Central Processor Unit: It s the component that interprets and carries out the command you give the computer through the input devices. It fetches, decodes and executes instructions, and transfers data to and from other components.
Ports These are sockets at the back of the main processor casing, which are used to attach the peripheral devices (printer, monitor, keyboard, mouse, etc). Cables from each peripheral plug into the port allowing data to be sent and received from the microprocessor. There are serial and parallel ports. A serial port transmits as COM1, COM2 and is referred to as male connectors because they have pins. A parallel port transmits data in bytes and therefore is much faster. Parallel ports are called LPT1, LPT2 and are designated female connectors because they have receptacles for pins. Motherboards.
The motherboard is the main printed circuit board of the computer, which usually forms the ‘floor’ of the system. All other electrical components are plugged into the motherboard (e. g. CPU and ‘Memory’). These components are linked by ‘Buses’ which are etched into the motherboard and carry signals from one component to another. Keyboard The keyboard is the most used input device and is used to key in data or enter commands to the computer. Almost all keyboards follow the standard IBM layout and design. Touching or pressing a key sends an electronic signal to the computer, which interprets, is as a character or function.
Monitor This is the computer Video display. This displays images (characters and graphics) generated by the computer’s video adapter. The image on the screen is referred to as ‘soft copy’- you will lose it when the computer is turned off. Monitors come in different sizes-15, 17, 19 and 21 inches. The size is determined by the distance between diagonal corners. Like television sets, most monitors use a cathode ray tube (CRT) which accounts for their size. The sharpness and clarity of the image is determined by its resolution.
Resolution is measured in pixels (picture elements). Printer These are used to produce hard copy of information needed from the screen. There are different types of printers such as Laser printers: are based on the technology used by photocopiers- lasers produce an image on an electrically charged drum, dry ink or toner sticks to electrical charge and this is fixed by heat. They have a high resolution of over 1,200dpi, can reproduce complex graphics, are almost silent and operate at a reasonably high speed of between 9-17 or more ppm depending on their cost.
Ink-jet printers use liquid to spray characters on to a page and they provide a similar high resolution of up to 1200dpi and are very quiet to operate. It can be difficult to distinguish between a printout from a good-quality ink-jet and a standard laser printer. Scanners Scanners read word, symbols and other graphics from a printed page and ‘translate’ the pattern of light and dark (or colour) into a digital signal the computer can and manipulate. Flatbed scanners illuminate the sheet of the item to be scanned by passing a bright bar of light over the page.
The reflected light is detected by photosensitive cells assembled into a picture. Scanners are very useful if you have large amount of text that needs to be copied into your word processor. Disk drives: This is a storage device that transfers data to and from a magnetic optical disk. Hard disk drives: The hard disk is the storage area (rather like a filing cabinet) where all the applications software you use and documents you create are kept. It is the main memory of the computer. Hard drives are measure in Gigabytes (GB) Floppy disk:
The floppy disk is a removable storage area which enables you to save files on a floppy disk that you can take data files between home and school or college and make back up copies of your data files as a security measure. Floppy disks are round, flat and made of a substance called Mylar. They have a magnetic surface, which allows the recording of the data, and is covered in a protective plastic shell. Most Personal computers take 3. 5-inch floppy disks, which can store up to 1. 44kb of data equivalent to 300 A4 pages of straightforward text. Video card: The video card controls the quality of what you see on your monitor.
It contains all the circuitry necessary for displaying graphics. It is a separate card, which usually fits into one of the motherboard’s slot, but sometimes this circuitry incorporated into the motherboard itself. Sound card: A type of expansion board on PC. Compatible computers that allows the playback and recording of sound, such as from a WAV or MIDI file or a music CD-ROM. Mouse: A mouse (a computer mouse) is a pointing device that enables you to control the movement and position of the screen cursor by moving the mouse around a surface such as a desk.