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6542201
Computer Hardware Pt.1
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Mind Map on Computer Hardware Pt.1, created by Neo Metcalfe on 03/10/2016.
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Neo Metcalfe
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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).
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.
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.
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.
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.
RAM: Random access memory.
Volatile Memory.
Anything stored within this will be lost as soon as the power is cut.
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