Memory

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Memory

• Random Access Memory
• (RAM)

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Memory

• RAM is Volatile
• Requires Electricity (Power)
• to function

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Memory

• Most common form of memory is
• Dynamic Random Access Memory (DRAM)

4
Memory

• DRAM consists of a Transistor and a Capacitor are
  paired to create a Memory Cell, which represents
  a single bit of data

5
Memory

• The capacitor holds the bit of information -- a 0
  or a 1

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Memory

• The transistor acts as a switch that lets the
  control circuitry on the memory chip read the
  capacitor or change its state.

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Memory

• Dynamic RAM has to be dynamically refreshed all
  of the time or it forgets what it is holding.
  Refreshing takes time and slows down the memory.

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Memory

• The length of time necessary to Refresh Memory is
  so short that it is expressed in nanoseconds
  (billionths of a second)

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Memory

• Types of RAM

SIMM single in-line memory module
DIMM dual in-line memory module
SODIMM small outline dual in-line memory
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Memory

• Common RAM TypesSDRAMDDR SDRAM
• DDR2 SDRAMRDRAMVRAMSGRAMRAMBUS

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Memory

• Memory Manufacturers
• www.crucial.com
• www.corsairmemory.com
• Etc.

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Memory

• How Much RAM do I Need?
• 256 MB Minimum for Windows XP
• 512 MB Minimum for Audio/Video Editing
• 1000 MB Minimum for 3D Design/Animation

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Memory

• Questions?