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A DIMM or dual in-line memory module comprises a series of dynamic random-access memory integrated circuits. These modules are mounted on a printed circuit board and designed for use in personal computers, workstations and servers. DIMMs began to replace SIMMs (single in-line memory modules) as the predominant type of memory module as Intel P5-based Pentium processors began to gain market share. While the contacts on SIMMs on both sides are redundant, DIMMs have separate electrical contacts on each side of the module. Another difference is that standard SIMMs have a 32-bit data path, while standard DIMMs have a 64-bit data path. Since Intel's Pentium, many processors have a 64-bit bus width, requiring SIMMs installed in matched pairs in order to populate the data bus. The processor would then access the two SIMMs in parallel. DIMMs were introduced to eliminate this practice. == Variants == Variants of DIMM slots support DDR, DDR2 and DDR3 RAM. The most common types of DIMMs are: * 72-pin SO-DIMM (not the same as a 72-pin SIMM), used for FPM DRAM and EDO DRAM * 100-pin DIMM, used for printer SDRAM * 144-pin SO-DIMM, used for SDR SDRAM * 168-pin DIMM, used for SDR SDRAM (less frequently for FPM/EDO DRAM in workstations/servers, may be 3.3 or 5 V) * 172-pin MicroDIMM, used for DDR SDRAM * 184-pin DIMM, used for DDR SDRAM * 200-pin SO-DIMM, used for DDR SDRAM and DDR2 SDRAM * 204-pin SO-DIMM, used for DDR3 SDRAM * 214-pin MicroDIMM, used for DDR2 SDRAM * 240-pin DIMM, used for DDR2 SDRAM, DDR3 SDRAM and FB-DIMM DRAM * 244-pin MiniDIMM, used for DDR2 SDRAM * 260-pin SO-DIMM, used for DDR4 SDRAM * 260-pin SO-DIMM, with different notch position than on DDR4 SO-DIMMs, used for UniDIMMs that can carry either DDR3 or DDR4 SDRAM * 288-pin DIMM, used for DDR4 SDRAM 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「DIMM」の詳細全文を読む スポンサード リンク
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