Comparison between Static and Dynamic RAM:

The current technological revolution around the globe has made the world faster with the advancements in sophisticated computer devices. Computer, as a digital machine enables people to work faster than ever before. The memory of a computer is a great feature of this digital tool. RAM, Random Access Memory is the primary tool of data storage that is inserted in the integrated circuit while data can be accessed in any sequence or randomly. Thus it is termed as random access memory or RAM.

The journey of dynamic and static RAM was initiated in 1960s which was readily developed in 1970s. In recent days, the technology is much more user friendly. RAM is classified into two types: Dynamic RAM and Static RAM. Static RAM uses a form of flip-flop to circulate data. It uses almost six transistors for its functioning. On the other hand, Dynamic RAM (DRAM) is typically charged on the capacitor in it.

Dynamic RAM is widely used memory device that is used in the current market. Dynamic RAM chip carries one bit of information and is made of a number of transistors and capacitors. The capacitor keeps the data and the transistor works as a switch to control circulation process.

Static RAM holds the data in the flip flop form where it carries each bit of information. It has different technology and memory storage method to Dynamic RAM.

The basic difference between Static and Dynamic RAM lies mainly in structure and work principal.

•Firstly the main difference in the structure varies due to transistor and capacitor number and setting as just three to four transistors are required for a Dynamic RAM, but six to eight MOS transistors are necessary for a Static RAM.

•Secondly Dynamic RAM memory can be deleted and refreshed while running the program, but in case of Static RAM it is not possible to refresh programs.

•Data is stored as a charge in a capacitor in Dynamic RAM, where data is stored in flip flop level in Static RAM.

•For refreshing a data another capacitor is required in case of Dynamic capacitor, but no refreshing option is available in Static RAM.

•A Dynamic RAM possesses less space in the chip than a Static RAM.

•Dynamic RAM is used to create larger RAM space system, where Static RAM create speed- sensitive cache.

•Static ram is 4 times more expensive than Dynamic RAM.

•Dynamic RAM consumes less power than Static RAM.

•For accessing a data or information, Static RAM takes less time than Dynamic RAM.

•Dynamic RAM has higher storage capacity. In fact it can store 4 times than Static RAM.

With all mentioned differences, the discussion can be concluded by saying that Dynamic RAM is slower than Static RAM, but it has a refreshing option which makes it more viable. Static RAM is costly and takes more spaces than Dynamic RAM, but is faster than the other.


  1. kaleem

    I am pursuing graduation and my subject is computer. The text book topics of my computer application book simply goes over my head as the language used there is complicated. I have bookmarked TechGenie in my PC and I refer to your articles to understand the subjects like this thoroughly. I understand your language completely and really enjoy the topics you bring here.

  2. lenora lovings

    Static ram uses a form of flip-flop to circulate data.Uses6 transistors , has different technology and memory for function, no refresh capabilities. Dynamic ram is usually charged on the capacitor in it and is used as a memory device . it has 3-4 transistors.the basic difference lies mainly in structures and work principles.

  3. Sachin Tyagi

    Thanks for the information iYogi. I never took the pain of reading about RAM but the details here are really useful. I knew that RAM is a useful part of a computer but I was not aware it is so important for storing the data. I hope TechGenie continues to give information likes this. Thanks again

  4. scarlet

    Hi! You know just a week before, my younger brother was asking me about two types of RAM but I could not answer him. I am glad to see the detailed information about RAM here. Now, I can suggest my brother to refer to this article in case he needs more information about RAM. I often visit TechGenie to read such knowledgeable articles, now I can ask my brother also to visit the site for any technical information.

  5. Eric Oden

    I did not know the difference between Static RAM and Dynamic RAM until I came across this write-up. It is so well described. Now I know what both the RAM means and what are they required for. I had gone through some of the other articles present in this site. All the write-ups are useful for both technology freaks and laypersons. I will frequent this site for sure.

  6. Sean

    I particularly like this section on your website as it is informative and fun to read. I have learnt so many new ways in which I can use the different applications by browsing through your posts.

  7. Joel

    After going through your article I have realized the difference between Static RAM and Dynamic RAM which I was previously unaware of. Your site is really good; whenever I find any difficulty regarding technology I find my answers here. Your solutions have made my life easy and I have gained a lot of technical knowledge through them. Thanks.

  8. Patrick

    I never knew that RAM is divided into two parts. RAM for me was a whole tool of data storage in the computer’s memory. That had always been my notion, but after I came across this write-up I realized where I was lagging behind. Thanks for the info, it really helped me. Will look through more contents on your site for better understanding.

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