Cache memory

Cache memory is a small supplementary section of RAM (Random Access Memory) that temporarily stores common instructions and data making them more quickly accessible than regular RAM. When a computer microprocessor processes data it looks first in the cache memory before going through the main memory, which reduces the average time to access the data.

Since cache memory is built into a computer's CPU (Central Processing Unit) you cannot simply increase it by buying more RAM and allocating it to the cache. To increase the size of your computer's cache memory you have to actually upgrade the CPU.