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Cache Size - GCSE Computer Science Definition

Reviewed by: James Woodhouse

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What is cache size?

In GCSE Computer Science, cache is a small but extremely fast type of memory located inside the CPU. The cache stores frequently used instructions and data, allowing the CPU to access them quickly rather than retrieving them from the slower RAM.

Why does cache size matter?

A larger cache size allows more data to be stored close to the CPU, reducing the number of fetch operations from RAM. This speeds up processing and improves overall system performance.

Revision resources to ace your exams

Explore cache size in more detail and master other key related terms such as clock speed and number of cores in our revision note pages here:

Characteristics of the CPU (OCR GCSE Computer Science)
Characteristics of the CPU (AQA GCSE Computer Science)
CPU components & their function (Edexcel GCSE Computer Science)

Challenge yourself with our expertly created topic questions and reinforce your learning with our interactive flashcards. 

GCSE Computer Science Revision Resources

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James Woodhouse

Reviewer: James Woodhouse

Expertise: Computer Science

James graduated from the University of Sunderland with a degree in ICT and Computing education. He has over 14 years of experience both teaching and leading in Computer Science, specialising in teaching GCSE and A-level. James has held various leadership roles, including Head of Computer Science and coordinator positions for Key Stage 3 and Key Stage 4. James has a keen interest in networking security and technologies aimed at preventing security breaches.

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