Cache - GCSE Computer Science Definition

What is cache?

In GCSE Computer Science, cache is defined as very small, very fast memory located in the CPU which is used to provide quick access to frequently used instructions and data.

Increasing the amount of cache in a CPU allows it to store more data temporarily, which boosts overall performance by reducing the time spent accessing frequently used instructions. This minimises the need for the CPU to fetch these instructions repeatedly from the slower main memory (RAM), thereby speeding up processing tasks and enhancing efficiency.

The cache plays a crucial role in the fetch stage of the fetch-decode-execute cycle.

Cache Revision Resources to Ace Your Exams

Explore cache in more detail and master other key related terms such as the control unit (CU) and arithmetic logic unit (ALU) in our revision note pages here:

CPU components & their function (OCR GCSE Computer Science)
Different types of memory (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