Memory

Memory

1. RAM: Used as main memory in a computer and it can be read and written to

   • Volatile memory: A temporary memory. Requires power to retain its data.
   • RAM is slower than CPU cache-faster than secondary storage
   • Virtual memory is used when RAM is full.
   • Extra RAM can help improve the performance of your computer

2. ROM: Tells the CPU how to boot up.

   • Non-Volatile : Permanent memory- keeps contents even when there is no power.
   • Can only be read and not written to.
   • Contains all instructions a computer needs to boot up (BIOS)

3. Storage

   • Primary
     • Refers to the memory areas that the CPU can access very quickly
   • Secondary
     • Where all data is stored when not in use
   • Tertiarty
     • Used for storing data for long term purposes
   • What to look for when choosing s.s
     • Capacity
     • Speed
     • Durability
     • Portability
     • Reliabilty
   • Hard disk drive: traditional internal storage in PC's and laptops.
     • Data is stored magnetically in small areas called sectors.
   • Solid state drives are storage devices with NO MOVING PARTS
     • Have a faster read/write time than HDDS.
   • Optical Disk
     • CDS
     • DVDS