Extended Data Out Random Access Memory

Definition of Extended Data Out Random Access Memory

Extended Data Out Random Access Memory (EDO RAM) is a type of DRAM memory developed in the mid-1990s, which improves the performance and speed of earlier RAM technologies. It accomplishes this by holding data ready for the processor and allowing data to be accessed for a slightly longer time, even after a new memory request is made. Although it was faster than its predecessors, EDO RAM was eventually replaced by Synchronous Dynamic Random Access Memory (SDRAM) due to technological advancements.


The phonetics of “Extended Data Out Random Access Memory” can be presented using the International Phonetic Alphabet (IPA) as follows:/ɪkˈstɛndɪd ˈdeɪtə aʊt ˈrændəm ˈæksɛs ˈmɛməri/Here is a breakdown of each word in the keyword:- Extended: /ɪkˈstɛndɪd/- Data: /ˈdeɪtə/- Out: /aʊt/- Random: /ˈrændəm/- Access: /ˈæksɛs/- Memory: /ˈmɛməri/

Key Takeaways

  1. Extended Data Out Random Access Memory (EDO RAM) is an improved version of the conventional DRAM that allows faster data access by overlapping subsequent memory read and write operations.
  2. EDO RAM provides enhanced performance in systems where faster memory access is needed, such as gaming computers and laptops. It was widely used in the mid-90s before being replaced by newer memory technologies like SDRAM and DDR RAM.
  3. Despite its higher data transfer rate relative to standard DRAM, EDO RAM is now considered obsolete due to the development of more advanced memory technologies with superior speed and efficiency.

Importance of Extended Data Out Random Access Memory

Extended Data Out Random Access Memory (EDO RAM) is an important technology term because it refers to a significant advancement in computer memory technology during the mid-1990s.

EDO RAM enhanced memory access speed and efficiency by allowing data transfers to occur even during the time when the CPU was processing other data, ultimately increasing overall system performance.

It was an innovative solution to the limitations of the previous technology, Fast Page Mode memory.

EDO RAM played a vital role in bridging the gap between conventional DRAM and the more advanced Synchronous DRAM (SDRAM), and was widely used in PCs, laptops, and other devices until it was eventually replaced by SDRAM.

Its impact on computers’ performance during its time and its role in the evolution of memory technology underline the importance of the term EDO RAM.


Extended Data Out Random Access Memory (EDO RAM) is a type of memory technology that significantly improved the performance of computer systems during the mid-1990s. The primary purpose of EDO RAM was to enhance the overall speed and efficiency of the data transfer process between computer memory and the Central Processing Unit (CPU). This technology was a crucial advancement during its time, as it allowed computers to handle high-performance tasks without lag, such as running sophisticated applications and graphical user interfaces, supporting advanced gaming, and managing multimedia content.

One of the key benefits of EDO RAM was its ability to execute concurrent processing. While data was being transferred from one memory cell, the EDO RAM could already access and queue data from another memory cell, effectively reducing the waiting time for the next data transfer.

This resulted in fewer delays and quicker response times, especially when dealing with large data sets or complex processes. Consequently, EDO RAM contributed to the overall positive user experience with smoother performance and enhanced multitasking capabilities in computer systems of that era.

As technology advanced, however, EDO RAM was gradually replaced with Synchronous Dynamic Random Access Memory (SDRAM), which provided even faster memory access times and improved synchronization with the system’s clock cycle.

Examples of Extended Data Out Random Access Memory

Extended Data Out Random Access Memory (EDO RAM) is a type of RAM technology used primarily in the mid-1990s. It provided better performance and efficiency compared to earlier RAM technologies, such as Fast Page Mode RAM (FPM RAM), by reducing wait states in the RAM access cycle. Here are three real-world examples of EDO RAM usage:

Personal Computers: EDO RAM was widely used in personal computer systems during the mid to late 1990s, especially in the then-popular Intel 486 (80486) and early Pentium PCs. It was the standard memory module for those systems, enhancing their performance and allowing faster data access.

Laptops: EDO RAM also made its way into laptops of the mid-1990s, offering a performance improvement over traditional FPM RAM. These laptops benefited from EDO RAM’s increased speed and efficiency, resulting in faster boot-up times, loading of applications, and improved overall system performance.

Graphics Cards: Some stand-alone graphics cards utilized EDO RAM to improve video memory performance, allowing for faster data access, which in turn resulted in smoother graphics and improved frame rates. One example of this is the Matrox Mystique graphics card, released in 1996, which used EDO RAM for its memory module.

FAQ for Extended Data Out Random Access Memory

What is Extended Data Out Random Access Memory (EDO RAM)?

Extended Data Out Random Access Memory (EDO RAM) is a type of dynamic random-access memory (DRAM) that offers faster performance than conventional RAM by allowing a data output duration to be extended beyond the next access cycle. This enables the processor to access other data while the previous data is still available, resulting in improved overall system performance.

What are the advantages of using EDO RAM?

EDO RAM offers various advantages, such as faster data access rates, improved system performance, and efficient utilization of bus bandwidth. It also reduces the number of wait states, which can lead to better performance in computers using EDO RAM technology.

What is the difference between EDO RAM and SDRAM?

EDO RAM and Synchronous Dynamic RAM (SDRAM) are both types of DRAMs; however, they have different characteristics. EDO RAM allows data output to be extended beyond the next access cycle, while SDRAM offers synchronous operation with the CPU’s clock. SDRAM is generally faster than EDO RAM, providing higher bandwidth and lower latency, which makes it the preferred choice for modern computer systems.

Can EDO RAM be used interchangeably with other types of RAM?

EDO RAM is not compatible with other types of RAM like Fast Page Mode (FPM) RAM, Synchronous DRAM (SDRAM), or Double Data Rate (DDR) RAM. Each type of RAM has unique requirements for memory modules, and mixing different types can lead to hardware incompatibility and unstable system performance.

What factors determine the compatibility of EDO RAM with a computer system?

Several factors determine EDO RAM compatibility, such as motherboard support for the EDO RAM standard, available expansion slots, bus speed, and the maximum RAM capacity supported by the computer system. To ensure compatibility, it is essential to consult the motherboard and system documentation or manufacturer’s guidelines before installing EDO RAM modules.

Related Technology Terms

  • Asynchronous DRAM
  • Fast Page Mode (FPM)
  • Memory Latency
  • Read/Write Cycle
  • Memory Banks

Sources for More Information


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