Memory

Memory
GCSE Computing…read more

Key Terms
Bit: Binary digit 0 or 1
Byte: 8 bits
Kilobyte: 1024 bytes
Volatile: Data lost when there is no power
Non Volatile: Data retained even when power is turned off
Virtual Memory: A section of the hard disk used as if it were
RAM to supplement the amount of main memory available to
the computer. Used when there is not enough main memory
to run the programs required.…read more

Types of Memory
Primary memory ­ RAM and ROM
Virtual memory ­ used when there isn't enough
RAM
Cache memory ­ used to speed up access to the
RAM
Flash memory…read more

Primary memory ­ RAM and ROM
What you will learn...
What RAM is and what it is used for
What ROM is and what it is used for
Main differences between RAM and ROM
How the amount of RAM affects a computer's
performance…read more

Virtual memory
What you will learn...
How a computer can use the hard drive as if it is
memory
How this can affect the performance of the
computer…read more

Cache and Flash memory
What you will learn...
Cache memory ­ how it makes the processor more
efficient
Flash memory ­ how erasable ROM technology
has made it possible to create new style storage
devices…read more