Mapa mental

Memory

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Memory

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
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)
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