4502580
Description
Mind Map by Josh Anderson, updated more than 1 year ago
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Created by Josh Anderson
almost 9 years ago
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Computing - OCR -
GCSE - Random
Access Memory and
Read-Only Memory
- RAM
- What is stored
in RAM?
- Data in
current use
- Operating
System
- Data in
current use
- Used in computer systems
as the main memory.
- Volatile
Memory
- Lost when power is lost.
- Lost when power is lost.
- Used to do immediate tasks.
- Quick
read/write
times
- Quick
read/write
times
- More RAM - More
programs open at the
same time
- Virtual memory
- When all RAM has been used
up, it moves data that has not
been accessed recently (Left
open in the background for
some time) to the hard drive
- Hard drive has slower
read/write times but
extends RAM capacity
- Hard drive has slower
read/write times but
extends RAM capacity
- When all RAM has been used
up, it moves data that has not
been accessed recently (Left
open in the background for
some time) to the hard drive
- Cache memory
- Very frequently used
data, quicker read/write
times than RAM
- Very frequently used
data, quicker read/write
times than RAM
- What is stored
in RAM?
- ROM
- Contains
prerecorded
data. Can only be
read, not altered.
- Non-volatile
Memory
- Not lost when power is lost.
- Not lost when power is lost.
- Stores essential
programs (Like ones
that allow computer
to start up)
- Sometimes used
in calculators
- Flash memory
- Non-volatile
Memory
- Solid State technology - no
moving mechanical parts
- Reliable and durable
- Being developed to
contain more and
more data
- Quicker
read/write times
than hard drives
- Reliable and durable
- Non-volatile
Memory
- Contains
prerecorded
data. Can only be
read, not altered.
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