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Hardware Lesson 3

Hardware Lesson 3. Inside your computer. Hardware. Motherboard Processor / CPU Bus Bios chip Memory Hard drive Video Card Sound Card Monitor/printer Ports. Computer memory. BIOS (flash memory) Read Only Memory (ROM) Random Access Memory (RAM) chips on motherboard open files

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Hardware Lesson 3

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  1. Hardware Lesson 3 Inside your computer

  2. Hardware • Motherboard • Processor / CPU • Bus • Bios chip • Memory • Hard drive • Video Card • Sound Card • Monitor/printer • Ports

  3. Computer memory • BIOS (flash memory) • Read Only Memory (ROM) • Random Access Memory (RAM) • chips on motherboard • open files • Virtual (part of your OS) • pagefile.sys • Video • graphics and games

  4. Software • Software = Computer Program = Instructions • Allow you to use your computer • Without software, the computer is useful as a planter

  5. Using Software • When you open an application, memory must be used to store the program that’s running and the file you have open. • Open files are stored in RAM chips. • Physical chips • Temporary storage of files and instructions • When files are too big to fit in RAM, the excess goes to Virtual Memory (on the hard drive). • The video is stored in Video memory, often in special chips on the Video card.

  6. Memory facts • Stored in KB (kilobytes), MB (megabytes), GB (gigabytes), TB (terabytes) • One MB ~ 1 million memory locations • A memory location (byte) stores one character • So, 512 MB will store about 512 million characters. • One MB can store about 500 pages of text information

  7. Creating Files • Sometimes you don’t need to save • Listing to music • Playing games • Surfing the Net • When you do need to save a file, you need to select a storage device.

  8. Storage devices • Can be internal or external • Measured in: • Size (MB, GB, TB) • Speed (mHz)

  9. Storage devices • Hard drive (contains disk) • Floppy • CD/DVD • CD/DVD-R: recordable • CD/DVD-RW : Re-Writable • Can be erased • Flash – static devices (no moving parts)

  10. Hardware Lesson 3 Inside your computer

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