Cache Memory vs. Main Memory

Cache Memory and Main Memory are two kinds of memories that store the amount of data. Both have a slight difference between them.

Main Difference

Cache Memory is a storage device that stores frequently accessed data, and its speed is very high. On the other hand, Main Memory is also a memory that is also known as Random Access Memory; it has more capacity to store data as compared to Cache Memory. In detail, let us discuss the main differences between Cache Memory and Main Memory.

What is Cache Memory?

Cache Memory is a memory storage device that stores accessed data. To quickly store the data, Cache Memory is a good choice. Its proximity to the CPU is significantly closer because it is attached to the CPU. Moreover, it has an extensive capability to store data in large amounts. Cache Memory is not a part of the hard drive, located in the processor itself.

Furthermore, the speed to store the data is very high. It holds used data and is more expensive as compared to Main Memory. In addition, Cache Memory is available in three different types named L1, L2, and L3.


  • Store the data
  • High capacity to store the data
  • Cost-effective
  • Accessibility is fastest
  • Speed is high

What is Main Memory?

Main Memory is a memory storage device known as Random Access Memory. Main Memory is a volatile memory and stores a large amount of data. Moreover, it holds the data that is currently being processed. Furthermore, the accessibility of Memory is speedy. It is comparatively less expensive compared to Cache Memory. The size of the device is more extensive. In addition, the proximity of the Main Memory with the central processing unit is comparatively far. Main Memory is available in two types named Static RAM and Dynamic RAM.


  • Stores a large amount of data
  • Speed is good
  • Size is large
  • Faster accessing Memory
  • Use currently processed data
  • Cost is less expensive

Key Differences between Cache Memory and Main Memory

  1. Main Memory stores a large amount of data as compared to Cache Memory.
  2. Main Memory is less expensive, while Cache Memory is more expensive.
  3. The speed of Cache Memory is higher as opposed to Main Memory.
  4. Cache Memory’s size is smaller, while Main Memory’s is more extensive.
  5. Cache Memory has three types named L1, L2, and L3, while Main Memory has two types called SRAM and DRAM.
  6. The accessibility of Cache Memory is faster in contrast to Main Memory.

Comparison table between Cache Memory and Main Memory

Features Cache Memory Main Memory
Storage capacity Store comparatively fewer data Stores a large amount of data
Cost More expensive Comparatively less expensive
Speed High Low
Types L1, L2, L3 SRAM, DRAM
Size Smaller Larger


In a nutshell, we can say that both Cache Memory and Main Memory differ in various aspects. They have their unique functions and features.

About Jackson Roy

Content Writer and a Business Student. I Write About Living a Wonderful Life Without Hurry, Making Different Choices, and Finding Happiness.

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