We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is a Dual in-Line Memory Module?

By Jeremy Laukkonen
Updated May 16, 2024
Our promise to you
EasyTechJunkie is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At EasyTechJunkie, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

The dual in-line memory module (DIMM) is a type of random access memory (RAM) utilized in various computers. Each module may utilize a number of what are known as a dual in-line package integrated circuits. Working in concert, these integrated circuits provide a way for computers to quickly write, read, and rewrite information in a dynamic manner.

Integrated circuits are simply miniaturized circuits that exist on the surface of a substrate material, such as silicon. Commonly known as microchips, the dual in-line package variety of integrated circuits can be recognized by their flat, rectangular shape. They also have two parallel rows of connector pins.

There are many different types of dual in-line memory module, each of which can have a different number of pins. These may range in number from 72 to 240, and typically dictate which type of DIMM the unit is. A DIMM with 72 pins may be known as a SO-DIMM, which stands for small outline dual in-line memory module. These relatively small RAM modules may be found in laptops, certain high-end printers, and PCs with small form factor mother boards. They are the smallest of the DIMMs, allowing them to be used in applications where space is a concern.

In addition to having different numbers of pins, many DIMMs have keyed notches that enable flawless installation. Since these notches are in different locations along the bottom of the DIMM, and may differ in number between one and three, it is generally impossible to install the wrong DIMM for any given application. By observing the location and number of the notches, it may be possible to determine whether the RAM module is correct before installation is even attempted.

The difference between the dual in-line and the single in-line memory module (SIMM) it replaced is that most DIMMs utilize a 64 bit bus width, while SIMMs only had a 32 bit data path. At one time processors with 32 bit bus widths were prevalent, but the introduction of 64 bit data path processors required SIMMs to be installed in matching pairs to add up to a total of 64 bits. The introduction of DIMMs allowed a single RAM module to be used in place of two SIMMs in these applications.

Dual in-line memory modules have gone through many evolutions in design since they were first introduced in the early 1990s. Subsequent generations of DIMMs, such as Double Data Rate (DDR), DDR2, and DDR3, all increased the amount of memory each module could contain, while also increasing the speed at which they could be written to and read.

EasyTechJunkie is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
By anon130075 — On Nov 26, 2010

I like this information,given by you. this is very useful for me to make my basic concepts clear. Thanks and regards. Roshan P.

EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.

EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.