20604500
Description
Memory
devices
- Computer memory is any physical
device capable of storing
information temporarily, like RAM
(random access memory), or
permanently, like ROM (read-only
memory).
- RAM
- Random access memory
- form of computer memory
that can be read and
changed in any order
- typically used to store
working data and
machine code
- allows data items to be read or
written in almost the same
amount of time irrespective of
the physical location of data
inside the memory.
- RAM is volatile, requiring
power to store data.
- RAM chips often range in
storage capacity from 1 to
256 GB.
- used in
computers to
temporarily store
files in use
- Random access memory
- ROM
- Read Only Memory
- ROM is a storage medium
that is used with
computers and other
electronic devices.
- Data stored
can only be
read
- mostly used for
firmware updates.
- A simple example of ROM
is the cartridge used with
video game consoles,
which allows one system
to run multiple games.
- Unlike RAM, ROM is
non-volatile, which
means it keeps its
contents regardless of
whether or not it has
power.
- Read Only Memory
- Hard disk drive
- It is non-volatile
- electromechanical data storage
device that uses magnetic
storage to store and retrieve
digital information using one or
more rigid rapidly rotating disks
coated with magnetic material.
- Stores data permanently
- secondary storage device
RAM primary storage device
- It is usually installed internally in a
computer, attached directly to the disk
controller of the computer's
motherboard.
- Hard drives are powered by a
connection to the PSU (power
supply unit).
- Far slower to access data
than ROM or RAM chips
- Examples of data that may be stored on a
computer's hard drive include the operating
system, installed software, and the user's
personal files.
- It is non-volatile
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