Computers, The Basics..

The basics of the computer start from the casing

. Cases are offered in two styles, desktop and tower. Today the tower type is predominant. It stands upright and is much taller than it is wide. It is usually placed on the floor next to, or under a desk. The desktop has a pizza box profile and usually sits on the desktop. The motherboard and power supply mount to the floor at the rear of the case. The drives (hard, floppy and CD/DVD) mount in enclosures called drive bays at the front of the case. The next most important thing would be the motherboard. The central unite inside the casing that is the brain of the computer. Of course the name mother coincides with the function. One of the major components inside the mother board is the cpu. The Central Processing Unit is often an Intel Pentium or Celeron processor. It is the heart of every PC. All scheduling, computation and control occurs here. Yes nothing would be possible without using a power supply which is supposed to supply power to the entire system. A power supply is installed in the back corner of the PC case, next to the motherboard. It converts 120vac (standard house power) into DC voltages that are used by other components in the PC. Where we store our date, the hard disk drive, also denoted by HDD. The HDD installs in one of the 3-1 2 inch internal drive bays in the PC. It is secured by machine screws. Data is stored magnetically on multiple rigid disks that are stacked up like pancakes. Small arms with magnetic pickups move rapidly back and forth across the top and bottom surface of each disk in the drive. The sensors float just a few microns above the rotating disk surface and can read and write data at very high rates. Most commercially available hard drives rotate at 5400 or 7200 RPM (revolutions per minute) which translates to 90 or 120 revolutions per second respectively. The data transfer rate from the drive to the motherboard is 33 bytes/second in bursts. Newer drives are capable of higher speeds up to 66 Mbytes/sec. To use this faster drive, the PC must have an ATA/66 interface tha is capable of keeping up with it. These days storage has gotten more, and you get easily find hard drives which have a capacity of more than a terabyte. And yes how would you see whatever is going on without a monitor? They are available in screen sizes from 14" to 21". A 17" display means that it is 17" measured diagonally from one corner of the tube to the other. The actual viewing area is smaller than 17" (about 16") since the electron gun can't sweep completely to the tube edge. So this covers the very basics of the computers outlook. Stay tuned for more in the coming days.

Company: Toronto pcs

Address: 222 Spadina Avenue, Unit # 116 A Toronto, ON - M5T3B3

Zip code: M5T3B3

Contact person: Fedrick Patrick

Phone: 647-693-5036

Email: fed.pats@gmail.com

More information can be found online at: http://www.torontopcs.com

by: Fedrick Patrick

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