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GCSE Computing Hardware

GCSE Computing Hardware

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Tags: technology   gcse   ocr   computing  

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Purpose: to carry out the processing on the computer
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CPU
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Used to store data in Binary format
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Storage device
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Used to enter Data into the computer
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Input Device
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Used to present the result of processing to the user
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Output device
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Has 4 separate cores which can work simultaneously to perform multiple tasks
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Quad-Core CPU
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To store parts of operating system, programs and data currently used by computer
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Purpose of RAM
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A section of the Hard disk is used to store items in Ram that are not currently being used
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Virtual Memory
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to allow more programs/data to be loaded when there is not enough RAM available
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Why is Virtual memory needed
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More memory for programs etc to be loaded into - will run quicker due to less use of Virtual memory
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Upgrading RAM
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Fetches instructions from memory, decodes then then Executes them. Also fetches Data
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Tasks carried out by CPU then processing Data
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Higher clock speed - faster computer will run - is how many Fetch execute cycles in a set time
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How does Clock speed affect performance
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More cache=less time accessing slower RAM so programs run faster. Cache memory much faster than RAM
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How does Cache Size affect Performance of CPU
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