ICT FINALS

• The System Unit is a case that contains electronic components of a computer used to process data 
• ↬ System Case ✧ aka; computer case, computer chassis, system casing, computer cabinet/housing
• ↬ Casing ✧ also called system
• Casing

  box like case that contains electronic components;
• 2 categories of casing

  1. Desktop
  2. Tower
• ↬ Desktop Case ✧ designed so that the system unit fit entirely on top of a desk
• mini tower height in average is 40cm (15inch)
• Mini tower

  • provides slightly more expansion capacity than a desktop case
• Mid tower 8 inch to 24 inch (45cm to 60cm)
• Mid tower

  • ●slightly shorter version of the full tower
• Full tower 24 inch height (60cm)
• Full tower

  • largest standard system case, has the most to offer in terms of expandability
• Full tower has 3-5 external bays
• ↬ Power Supply ✧ converts the wall outlet AC power into DC power
• some external peripherals have an AC adapter, which is an external power supply
• UPS - uninterruptable power supply
• AVR - automatic voltage regulator
• DC - direct current
• AC - alternating current
• Peripheral

  • Any device connected to the computer
• Uninterruptable power supply

  • Device that maintains power in fhe event of a failure
• Motherboard

  • Main circuitboard of a system unit
• A computer chip contains integrated chips
• The processor is also called the central processing unit
• CPU - central processing unit
• Processor

  • Interprets and carries out the basic instructions needed to operate a computer
• Processor contains a control unit and arithmetic logic unit
• ALU - arithmetic logic unit
• Control Unit

  • Tye component of the processoe that directs and coordinates most of the operations in the computer
• Arithmetic logic unit

  • Performs arithmetic, comparison, and other operations
• A processor repeats a set of four basic operations, which comprise a machine cycle
• The processor contains registers, that temporarily hold data and instructions
• System Clock

  • Controls the timing of alll computer operations
• The pace of the system clock is called the clock speed, and is measured in gigahertz
• GHz - gigahertz
• The leading manufacturers of personal computer processor chips are Intel and AMD
• A processor chip generates heat that could cause the chip to burn up
• Adapter Card

  • Enhances functions of a component of the system unit and/or prvides connections to all peripherals
• With plug and play, the computer automatically configures adapter cards and other peripherals as you install them
• Port

  • The point at which a peripheral attaches to or communicates with a system unit