May 2, 2021

All You Need to Know About Primary and Secondary Memory as well as Graphics Unit

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Simple explanation about RAM, ROM, HDD, SDD and Graphics Card.
primary and secondary memory
It is essential to know about the storage capacity and graphics card when one decides to buy a computer. What I mean by storage capacity. It’s obviously the primary and secondary memory.

Memory is the inevitable part of a computer as it stores all the important data. There are two types of main memory – one is primary and the other is secondary.

It is also important to check the graphics card. How would one choose the better? Which fits best for your need?

I’ll be explaining everything in this article. This article is for those who are searching for basic information about Primary and Secondary memory.

gpu Primary Memory

Primary memory immediately supplies the necessary data to the CPU so that the machine works properly.


It is categorized into three types – RAM and ROM, and Cache memory.


Known as the Random Access Memory. RAM is required when the information is immediately needed for the computer. Let’s see the characteristics of it.

Characteristics of RAM
  1. Very faster than other secondary memories.
  2. Read and write capacity.
  3. It is called volatile memory because you lose all your data when the power is cut off.
  4. RAM comes at a very expensive price.
RAM also can be classified into two types – SRAM and DRAM.
SRAM or Static Random Access Memory is used for the cache memory
DRAM or Dynamic Random Access Memory is used for the main memory purpose.

The main differences between SRAM and DRAM are

  • SRAM is faster than DRAM.
  • It is more expensive.
  • It cannot store many bits per chip whereas DRAM can do this.
  • SRAM uses more power than DRAM.

Known as the Read-Only Memory which is categorized into PROM, EPROM, and EEPROM.

ROM helps in the booting process. The operating system is stored in your secondary memory. When you turn on the computer, ROM reads the instruction and loads the operating system to start up.

Characteristics of ROM
  1. Non-volatile. So, there is no worry when the power cuts off.
  2. Inbuilt memory that can’t be changed by the users because one cannot rewrite the program.
  3. Permanent memory because ROM stores programs permanently.
  4. Data cannot be written easily.

ROM is also classified into 3 types – PROM, EPROM, and EEPROM.

PROM stands for Programmable Read-Only Memory. It means the data can be programmed by the user.
EPROM stands for Erasable Programmable Read-Only Memory. The data can be reprogrammed by erasing all the previous data.
EEPROM stands for Electrically Erasable Programmable Read-Only Memory.  The data can be erased by using an electric field. There is no need to use ultraviolet rays.

gpuSecondary Memory

Secondary memory is the physical element in a computer.
It can either be located in your machine or it can be connected through a network.

Secondary memory can be categorized into HDD (absorbs huge battery and slower than SSD), SSD (absorbs less battery and faster than HDD), flash drive, floppy disk, etc.

gpu GPU

GPU or Graphics Processing Unit is responsible for the video and picture quality.

It is a specific electronic circuit intended to quickly control and change memory to speed up the making of pictures in a framed butter planned for yield to a display device. GPUs are utilized in mobile phones, PCs, workstations, and game consoles.

The more capacity the GPU is, the higher the clarity will be in your picture. There are several graphics card manufacturers like NVIDIA, AMD, Gigabyte, Asus, Intel, etc.



The graphics card is divided into two categories – dedicated and integrated.



A dedicated graphics card has its own different CPU and RAM. The dedicated graphics card is for those who are involved with high-end gaming or designing.



An integrated graphics card uses the system CPU. The integrated graphics card is for those who use the computer for general purposes like simple office work, web browsing, or watching videos. 3D game is also possible but has some limitations with it.

Now you have basic information about Primary and Secondary memory.

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  1. bumBrubbon

    As it is curious.. 🙂

  2. Feadeothe

    Good post!

    • UTBa

      Thanks for your feedback, keep reading!

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