Chapter 2 Hardware Designed to Meet the Need

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Chapter 2Hardware Designed to Meet the Need

• The Digital Revolution
• Integrated Circuits and Processing
• Storage
• Input, Output, and Expansion
• Selecting and Purchasing a Computer

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2.3 Storage
From CH1 Storage is the ability to maintain data
within the system temporarily or permanently
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System Storage

• Random Access Memory, RAM, or primary storage
• Volatile memory that stores currently running
  software OS and apps, and data in addressed
  cells.
• 512 MB Standard, 1 GB recommended
• RAM SIMM or DIMM Single or Dual In-line Memory
  Modules are inserted in slots in the Motherboard

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Memory Hierarchy
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Other Types of Memory

• Cache Memory is fast access storage on the
  processor
• Graphics Memory is included on graphics card for
  faster video display
• ROM stores the boot process instruction that
  start the computer and load the OS from hard
  drive into RAM
• CMOS memory provides semipermenant storage for
  system configuration information that may change.

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Graphics Card

• Todays high-end graphics cards are computers
  unto themselves that include a Graphics
  Processing Unit (GPU) and hundreds of MB of
  graphics memory.
• PCI Express vs AGP
• Dedicated, integrated, hybrid

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Secondary Storage

• Storage Methods
• Sequential Access (tape)
• Direct Access (disk or solid state)

• Storage Media Type
• Magnetic storage devices use the magnetic
  properties of iron oxide particles to store bits
  and bytes more permanently than RAM.
• Optical storage media, such as CDs and DVDs store
  bits using an optical laser to burn pits into the
  surface of a highly reflective disk surface.
• Solid State storage devices use flash memory to
  store bits.

Tape Drive
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Secondary Storage

• Secondary storage is used to store data more
  permanently without the need for electricity.

Tape Drive
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Magnetic Media

• Hard Disk Drives
• Magnetic Tape
• High-capacity Disks (Zip, etc)
• Floppy Disks (outdated)
• Microdrives

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Optical Media

• CD, DVD, Blu-laser Disk (BD)

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Solid State

• A flash memory card is a chip that, unlike RAM,
  is nonvolatile and keeps its memory without the
  need for electricity.
• USB Flash Drives use flash memory to provide high
  capacity storage through the USB port.

Universal Serial Bus or USB is a standard that
allows a wide variety of devices to connect to a
computer through a common port.
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Internet Storage

• Users are increasingly storing data on Web
  servers, rather than on PCs through services
  provided by companies like Yahoo, MSN, Google and
  others.
• Google offers Web-based Email, Calendar, Photo,
  Spreadsheet, and Word Processing services that
  provide the software and substantial online
  storage for free.

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Storage Criteria

• Choose storage media by the
• Cost per MB
• Capacity
• Portability
• Durability
• Security
• Accessibility
• as associated with the requirements of the data
  and usage

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network
Storage Review
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2.4 Input, Output, and Expansion
Read on your own
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2.5 Selecting and Purchasing a Computer
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Strategies for Computer Shopping

• Choose type notebook, desktop, tablet, handheld
• Choose platform
• Windows/Mac/Linux
• Palm/WindowsMobile
• Choose Manufacturer
• Choose Model
• Select Add-ons
• The all-important Warranty

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Helpful Links for Computer Shopping

• Research
• www.zdnet.com
• www.cnet.com
• www.macworld.com
• Computer Retailers
• www.cdw.com
• www.compusa.com
• Direct from Manufacturer
• www.apple.com
• www.dell.com
• www.sony.com
• www.hp.com
• www.gateway.com
• www.toshiba.com

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Chapter 2 Questions?