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How Computers Work
•The Four Basic Operations
•The Boot Process
•Hardware Components & Their Functions
•Differences in Portable Devices
The Four Basic Computer
Operations
 Input – Getting data from the
outside world into the computer
 Processing – Manipulating the
information
 Output – Presenting data from the
computer to the outside
 Storage – Efficiently and
inexpensively holding data for later
use.
Hardware to Provide
Four Functions
The Boot Process
1. The Basic Input/Output System (BIOS)
setup program loads and runs
2. The Power-On-Self-Test (POST) runs
3. The Operating System loads
4. System Configuration
5. System utilities load
PC Components
 Case
 Processor
 Power Supply
 Motherboard
 Memory
 Hard Drives
 Removable Media Drives
 Video, Audio Functionality
 Monitor
 Mouse, Keyboard
The Processor
 Single core vs. Dual core
 Intel vs. AMD
 Trade-off between price and speed
• The newest, fastest processors are
always overpriced. Best "bang for the
buck" is with the next step down.
System Memory
 How much?
• Single core or dual core processor
• Types of applications
 What kind?
• Types
 SDRAM
 DDR SDRAM
 DDR2 SDRAM
• Motherboard and CPU must support.
Choosing a Power Supply
 Enough power for high class video
cards
 Special connectors available for SATA
Hard Drives and PCI-E video cards
 Motherboard may have a 20-pin or
24-pin main connector
Storage
 Hard Drives
• How much, based on applications used
• What type (SATA or PATA)?
 Optical Drives
• CD Burner, DVD-ROM, DVD Burner
(Single Layer or Dual Layer)
• How many? Two really make copying
disks easy.
 Floppy Drive?
Hard Drives
 IDE (ATA)
• EIDE – ATA2 aka Fast ATA
• ATA3 – Ultra ATA - Improved interface,
hard drives can report status
information to the MB.
• Two devices per channel (or cable)
 SATA – Serial ATA
• One device per channel
 SCSI – Many devices can be daisy-
chained.
Choosing a Motherboard
 Supports the chosen Processor
 Storage connectors ( PATA [aka IDE],
SATA150, SATA 3.0)
 Memory type and amount
 Built-ins (Video, Audio, LAN)
 Graphic Card support (PCI-e, AGP)
 PCI Expansion slots
 RAID support
Factors in Choosing a Case
 4 Form Factors
• Desktop
• Mid-Size Tower
• Full-Size Tower
• Little, Teeny, Tiny Cases (VSFF)
 External and Internal Drive Bays
 Front (Top) Panel Multi-Media
Connectors
 Cooling System (can also add-on)
Display
 Made up of two components
• Monitor
• Video card or circuitry
Monitors
 CRT
• Cheaper
• Takes up more desktop real estate
• Can tire your eyes
 Flat Panel
• More expensive
• Saves space
• Sharper Image
Video Cards
 PCI
• Fits in a standard expansion slot
• General purpose video
 Accelerated Graphics Port (AGP)
• AGP 2X/4X, AGP 4X/8X, AGP Pro 4X/8X
 PCI Express (PCIe)
• PCIe x1, PCIe x4, PCIe x8, PCIe x16
Replacing a Video Card
 Make sure you don't buy too much
card for the monitor.
 It doesn't matter if the original video
was built-in to the motherboard.
Installing a video card and loading
drivers "takes over" from the old
video.
 Get a card the motherboard
supports.

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computer software.ppt

  • 1. How Computers Work •The Four Basic Operations •The Boot Process •Hardware Components & Their Functions •Differences in Portable Devices
  • 2. The Four Basic Computer Operations  Input – Getting data from the outside world into the computer  Processing – Manipulating the information  Output – Presenting data from the computer to the outside  Storage – Efficiently and inexpensively holding data for later use.
  • 4. The Boot Process 1. The Basic Input/Output System (BIOS) setup program loads and runs 2. The Power-On-Self-Test (POST) runs 3. The Operating System loads 4. System Configuration 5. System utilities load
  • 5. PC Components  Case  Processor  Power Supply  Motherboard  Memory  Hard Drives  Removable Media Drives  Video, Audio Functionality  Monitor  Mouse, Keyboard
  • 6. The Processor  Single core vs. Dual core  Intel vs. AMD  Trade-off between price and speed • The newest, fastest processors are always overpriced. Best "bang for the buck" is with the next step down.
  • 7. System Memory  How much? • Single core or dual core processor • Types of applications  What kind? • Types  SDRAM  DDR SDRAM  DDR2 SDRAM • Motherboard and CPU must support.
  • 8. Choosing a Power Supply  Enough power for high class video cards  Special connectors available for SATA Hard Drives and PCI-E video cards  Motherboard may have a 20-pin or 24-pin main connector
  • 9. Storage  Hard Drives • How much, based on applications used • What type (SATA or PATA)?  Optical Drives • CD Burner, DVD-ROM, DVD Burner (Single Layer or Dual Layer) • How many? Two really make copying disks easy.  Floppy Drive?
  • 10. Hard Drives  IDE (ATA) • EIDE – ATA2 aka Fast ATA • ATA3 – Ultra ATA - Improved interface, hard drives can report status information to the MB. • Two devices per channel (or cable)  SATA – Serial ATA • One device per channel  SCSI – Many devices can be daisy- chained.
  • 11. Choosing a Motherboard  Supports the chosen Processor  Storage connectors ( PATA [aka IDE], SATA150, SATA 3.0)  Memory type and amount  Built-ins (Video, Audio, LAN)  Graphic Card support (PCI-e, AGP)  PCI Expansion slots  RAID support
  • 12. Factors in Choosing a Case  4 Form Factors • Desktop • Mid-Size Tower • Full-Size Tower • Little, Teeny, Tiny Cases (VSFF)  External and Internal Drive Bays  Front (Top) Panel Multi-Media Connectors  Cooling System (can also add-on)
  • 13. Display  Made up of two components • Monitor • Video card or circuitry
  • 14. Monitors  CRT • Cheaper • Takes up more desktop real estate • Can tire your eyes  Flat Panel • More expensive • Saves space • Sharper Image
  • 15. Video Cards  PCI • Fits in a standard expansion slot • General purpose video  Accelerated Graphics Port (AGP) • AGP 2X/4X, AGP 4X/8X, AGP Pro 4X/8X  PCI Express (PCIe) • PCIe x1, PCIe x4, PCIe x8, PCIe x16
  • 16. Replacing a Video Card  Make sure you don't buy too much card for the monitor.  It doesn't matter if the original video was built-in to the motherboard. Installing a video card and loading drivers "takes over" from the old video.  Get a card the motherboard supports.