The DIMM is the dual in-line memory module while SIMM is single in-line memory module. A DIMM consists of several dynamic random access memory integrated circuits. The memory modules on DIMM are designed to be used in personal computers, the servers, and the workstations in different organizations. The memory modules of DIMM are mounted on printed circuit boards. The DIMM memory modules began replacing the SIMM memory modules as soon as they were introduced in the market.
The reason for DIMM taking over SIMM was that DIMM memory modules were predominantly used in the Intel’s Pentium processors and the Intel Pentium processors were rapidly gaining larger market share. One of the major differences between DIMM and SIMM is that the DIMM contains separate electrical contacts on the two sides of the memory module while the electrical contacts on two sides of SIMM are redundant. Another difference between DIMM and SIMM is that SIMM has only 32-bit data path while DIMM has 640-bit data path that provides higher capacity to DIMM. The Pentium processors have a 64-bit bus width.
The processor required the SIMMs to be installed in matching pairs so as to complete the data bus. The Intel Pentium processor then used the two SIMMS simultaneously. DIMM was introduced to eliminate the practice of using two SIMMs simultaneously. DIMM is referred as the single-sided or double sided depending on the location of the memory devices where it is used. The two terms of DIMM usage may be confusing as they do not indicate any logical functioning of DIMM.
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