6542201
Description
Mind Map by Neo Metcalfe, updated more than 1 year ago
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Created by Neo Metcalfe
almost 8 years ago
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Computer Hardware Pt.1
- Central
Processing
Unit (CPU)
- The Purpose of
the CPU is to
process data.
- FETCH: (1st step) fetch data and
instructions from main memory
then store them in own internal
temporary memory areas.
- DECODE: (2nd
step) CPU has to
decode (make
sense of) the
instruction that it
has just fetched.
- EXECUTE: (3rd
step) Carry out
the data (This is
when the
processing takes
place).
- EXECUTE: (3rd
step) Carry out
the data (This is
when the
processing takes
place).
- DECODE: (2nd
step) CPU has to
decode (make
sense of) the
instruction that it
has just fetched.
- FETCH: (1st step) fetch data and
instructions from main memory
then store them in own internal
temporary memory areas.
- Cache
- Used to temporarily
hold
instructions/commands.
- Small amount of
memory which is
part of a CPU.
- The larger the cache size,
the better the
performance as it is able
to store more data
locally.
- Used to temporarily
hold
instructions/commands.
- No. Cores
- CPUs with multiple
cores have the power
to run multiple
programs at the same
time.
- CPUs can contain one
or more processing
units - each unit
called a core.
- CPUs with multiple
cores have the power
to run multiple
programs at the same
time.
- Clock Speed
- Clock speed
indicates how
fast the CPU
can run.
- The CPU clock
speed is
measured in
cycles per
second.
- The speed of the
clock determines
basic performance
of the CPU - the
faster it goes, the
more powerful the
computer is.
- Clock speed
indicates how
fast the CPU
can run.
- The Purpose of
the CPU is to
process data.
- Memory
- ROM: Read
only memory
- Non-volatile
memory.
- Stores the
instructions which
the computer uses
when it 'boots up'
the BIOS.
- ROM retains
data even
without
power.
- Non-volatile
memory.
- RAM:
Random
access
memory.
- Volatile Memory.
- Anything stored within
this will be lost as soon as
the power is cut.
- Volatile Memory.
- ROM: Read
only memory
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