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Home » Dictionary » Memory

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Numeric

SIMM-30
Author: Gabriel Torres Last Updated: December 29, 2005
Category: Memory

Single In Line Memory Module - 30 pins

SIMM-30 was the first memory module to obtain commercial success, developed over an old memory module type called SIPP. SIMM-30 modules are 8-bit modules and use FPM (Fast Page Mode) memory chips

Since it is an 8-bit module, its installation must be made like the following:

  • 286 and 386SX: Two in two, since the CPU accesses the memory using 16 bits.
  • 386DX, 486 and 5x86: Four in four, since the CPU accesses the memory using 32 bits.

This module was used up to 486 times, being gradually replaced by SIMM-72 memory module.

SIMM-30
click to enlarge
Figure 1: SIMM-30 memory module.

SIMM-72
click to enlarge
Figure 2: Motherboard with both SIMM-30 and SIMM-72 sockets.

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