Difference Between Primary and Secondary Memory

We have been trying to differentiate different type of memories in our earlier posts. You may like to have a look at it here. Focus of this post is to chalk out the difference between Primary and Secondary Memory and here it is:

Primary Memory

Secondary Memory

These are semiconductor memories. These are magnetic and optical memories.
They are characterized as volatile random access memories (RAM) or non-volatile memories (ROM). They are non-volatile.
They contain program and data that is currently being used by micro processor. These are used to for bulk storage.
These memories are fast enough to interact with the microprocessor. Slower than primary memories.
Also known as Main Memory Also known as Backup Memory or Auxiliary Memory. E.g. Tapes, Floppies, Hard Discs, CD ROMs, DVDs

The information stored in the secondary memory required by the computer for processing is transferred to micro processor via the primary memory.

Hope you find the information presented here to the point and useful. Feel free to leave your suggestions and feedback in the comments section below.

  1. Hi Diksha,

    Thank you for an awesome feedback, that’s kind of you.

    Example of primary memory are RAM, ROM, EPROM etc.


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