GlossariesGCSE GlossariesGCSE Computer Science GlossaryCache Size

Cache Size - GCSE Computer Science Definition

Reviewed by: James Woodhouse

Last updated

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.

Examiner-written GCSE Computer Science revision resources that improve your grades 2x

  • Written by expert teachers and examiners
  • Aligned to exam specifications
  • Everything you need to know, and nothing you don’t
GCSE Computer Science revision resources

Share this article

James Woodhouse

Reviewer: James Woodhouse

Expertise: Computer Science & English Subject Lead

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.

The examiner written revision resources that improve your grades 2x.

Join now