RAM, ROM and VM

RAM, ROM and VM

1. RAM (Random Access Memory

   • Comes in multiple types and speeds
     • DDR, DDR2, DDR3, DDR4
     • Clock Speed varies in MHz
     • Different Capacities
       • 1GB, 2GB, 4GB, 8GB Sticks
         • Can have more than one stick for greater capacity.
   • VOLATILE
     • WILL BE LOST ON POWER LOSS
   • Used by running programs to store important information required for the smooth function of said program.
   • Can be used as a RAM Disk
     • Extremely fast storage
     • Has to be saved to secondary storage to avoid data loss
     • Can be automatically made and written to on startup
   • Accessed by the CPU to obtain instructions (in the FETCH process)

2. ROM (Read-Only Memory)

   • Read-Only
   • Stores boot-up instructions
   • Usually in the form of a chip soldered on the motherboard
   • Examples
     • BIOS (Basic Input Output System)
   • Non-Volatile

3. VM (Virtual Memory)

   • VOLATILE

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