What Is SIMM Memory?

What Is SIMM Memory? thumbnail
SIMM memory modules connect to a computer's motherboard

Computers use memory systems to retrieve and store information. Memory components have evolved throughout the decades. SIMM memory is one system once commonly used in computers.

  1. Definition

    • A SIMM, or single in-line memory module, is a memory module on a printed circuit board containing RAM memory. RAM, or random access memory, is a temporary form of computer data storage. SIMM modules were widely used in computers from the early 1980s through the late 1990s but were later replaced by DIMMs, or dual in-line memory modules. SIMMs differ from DIMMs in that SIMMs house redundant contacts on both sides of the module. SIMM modules also use a 32-bit bus, or data channel. DIMMs utilize a 64-bit bus.

    Process

    • SIMM modules connect to the computer via a memory socket on the motherboard, or primary circuit board. SIMM modules must be inserted into the socket at an angle, and then rotated into the proper position. To remove a SIMM module, the clips attached at either end of the module must be turned to one side. The module can then be tilted back at an angle and removed.

    Fun Fact

    • Wang Laboratories invented the SIMM module in 1983.

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  • Photo Credit motherboard image by Horticulture from Fotolia.com

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