Significance of DIMM
A series of dynamic random access memory (DRAM) integrated circuits is called as dual in-line memory module (DIMM). They can be used in personal computers and workstations when mounted on a printed circuit board. As the name says it is the successor of single in-line memory module (SIMM) and said to have twice its storage capacity. DIMM’s have separate electrical contacts unlike the SIMM which has redundant connections on both the sides. These are most commonly used in Intel Pentium and other processes.
Standard SIMM’s have 32-bit data path and the standard DIMM’s have 64-bits. Any memory module will have key position and pins that are said to be specific. The key position of DIMM is its 168-pin SDRAM (synchronous dynamic RAM). This pin has 2 notches one with DRAM as the key position and the second is voltage key position. The former represents RFU (reserved future use). These key positions especially allow for fool proof installation and have a check on any kind of incompatible memory types’ installation.
A special type of electronic chip is present in the computer, Serial Presence Detect (SPD). This identifies the capacity and timing parameters of the memory module. Any DIMM can be ranked by the number of independent sets of DRAM that has been accessed for bit-width of a data. There are many types of DIMM that vary according to their memory capacity like 72-pin SO-DIMM, 100-pin DIMM, 184-pin DIMM, 172-pin Micro - DIMM etc., DIMM’s are used at different standardized speed for various technologies.
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