Memory
- Created by: ShackletonJ
- Created on: 11-04-18 16:28
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- Memory
- RAM
- Main memory
- Where all data, files and programs are stored while in use
- Volatile
- Requires power to retain data
- When a computer boots up, the operating system is copied from secondary storage to RAM
- Slower than CPU cache, but much faster than secondary storage
- When software applications, documents and files are opened, they are copied from secondary storage into RAM
- Main memory
- Virtual Memory
- When RAM is full, it moves unused data to a location on secondary storage (known as virtual memory)
- Can be used if too many applications are open at once
- Or if a memory-intensive application is in use
- Data must be moved back to RAM for the CPU to read it
- This is very slow
- If this is done often, a computer can become slow to respond
- ROM
- Non-volatile
- Keeps contents when there is no power
- Comes on a small chip built into the motherboard
- Contains the BIOS - the instructions that a computer needs to boot up
- Basic Input Output System
- The BIOS is a type of firmware
- Basic Input Output System
- Non-volatile
- RAM
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