103b ar 2012

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Lab Report for CSC103


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  • Dell
  • Model number: DHS

Parts of a computer

  • Processor
  • RAM
  • CD/ DVD Drive
  • Power Supply
  • Hard Disk
  • Motherboard
    • Crystal
    • Battery
  • Expansion Card
  • Fan
  • DIMM


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Brand: Intel Model Number: Pentium 4

The processor is located on the motherboard under the fan. According to Wikipedia, the processor, similar to a human’s brain, carries out the instructions of a computer program. It performs the basic arithmetical, logical, and input or output operations of the system. The fundamental operation of processors is to execute a program, a sequence of stored instructions. There are four steps that processors use in their operation: fetch, decode, execute, and writeback. The processor is composed of two parts: the arithmetic logic unit (ALU), which implements arithmetic and logical operations, and the control unit (CU), which extracts instructions from memory and decodes and executes them, calling on the ALU when necessary. (in Wikipedia. Retrieved Feb. 19 2012, from http://en.wikipedia.org/wiki/Central_processing_unit).

Random Access Memory

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The Random Access Memory (RAM) is found on the upper left-hand side of the motherboard. In this PC, two 256 MB RAMS were found. The company that makes this RAM has a symbol of an M surrounded by a halo. According to Wikipedia, the RAM is a form of computer data storage, allowing one to read and over-write data. Often associated with volatile types of memory, its stored information is lost if the power is removed. There are two main forms of modern RAM: static RAM (SRAM) and dynamic RAM (DRAM). (in Wikipedia. Retrieved Feb. 19 2012, from http://en.wikipedia.org/wiki/Random_Access_Memory).

CD/ DVD Drive

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The CD/ DVD drive can be found on the opposite side of the mother board, to the left of the hard drive. This computer contains a DVD R/RW drive. According to Wikipedia, the DVD R/RW drive is a disk drive that uses laser light or electromagnetic waves near the light spectrum as part of the process of reading or writing data to or from optical discs. The disk drive can be used to back up relatively small volumes of data. Commonly used in computers to read software and consumer media distributed on disc, they could also be used to record discs for archival and data exchange purposes. (in Wikipedia. Retrieved Feb. 20 2012, from http://en.wikipedia.org/wiki/Optical_disc_drive).

Power Supply

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The power supply is located on the right side of the motherboard. It can output a maximum of 210 watts of power. The numerous thin cables that connect to the power supply are battery power. The flat cables transfer data. According to Wikipedia, the power supply is a device that supplies electrical energy to one or more electric loads. This device converts one form of energy to another such as electrical energy. A power supply may be implemented as a discrete, stand-alone device or as an integral device that is hardwired to its load. Attributes of power supplies comprise of the amount of voltage and current it can supply to its load, how stable its output voltage or current is under varying line and load conditions, and how long it can supply energy without refueling or recharging. (in Wikipedia. Retrieved Feb. 20 2012, from http://en.wikipedia.org/wiki/Power_supply).

Hard Disk

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The hard disk is located on the opposite side of the power supply, on the right side of the DVD Drive. The number of Gigabytes of data this hard disk holds is unknown. According to Wikipedia, the hard disk is a device for storing and retrieving digital information, mainly computer data. It contains one or more rigid rapidly rotating discs or platters which are coated with magnetic material and with magnetic heads arranged to write data to the surfaces and read it from them. Classified as non-volatile, random access, digital, magnetic, and data storage devices, hard drives are the dominant devices for secondary storage of data in general purpose computers. (in Wikipedia. Retrieved Feb. 20 2012, from http://en.wikipedia.org/wiki/Hard_disk).


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The motherboard is located on the left side of the power supply. The lines on the board are wires that connect data and power. On the motherboard is two crystals, located to the right of and above the processor, which function is to make sure the computer operates on a time system. The small battery on the motherboard keeps track of the data and time. According to Wikipedia, the motherboard is the central printed circuit board (PCB) that holds many of the crucial components of the system, providing connecters for other peripherals. Similar to that of a backplane, the motherboard provides the electrical connections by which the other components of the systems communicate. However it also connects the central processing unit and hosts other subsystems and devices. The crystal, also known as the crystal oscillator, is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a precise frequency. This frequency is used to keep track of time to provide a stable clock signal for digital integrated circuits and to stabilize frequencies for radio transmitters and receivers. The quartz crystal is the most common type of piezoelectric resonator. The backup battery provides power to a system when the primary source of power is unavailable. (in Wikipedia. Retrieved Feb. 20 2012, from http://en.wikipedia.org/wiki/Motherboard, http://en.wikipedia.org/wiki/Crystal_oscillator#Electrical_oscillators, http://en.wikipedia.org/wiki/Backup_battery).