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History
SIMM
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A SIMM is a type of memory module used in computers from the early 1980s to the early 2000s. It is a printed circuit board on which has random-access memory attached to one or both sides. It differs from a dual in-line memory module (DIMM), the most predominant form of memory module since the late 1990s, in that the contacts on a SIMM are redundant on both sides of the module. SIMMs were standardised under the JEDEC JESD-21C standard.
Two 30-pin SIMM slots on an IBM PS/2 model 50 motherboard
Two 30-pin SIMM slots on an IBM PS/2 model 50 motherboard
Memory module
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In computing, a memory module or RAM stick is a printed circuit board on which memory integrated circuits are mounted.
Two types of DIMMs (dual in-line memory modules): a 168-pin SDRAM module (top) and a 184-pin DDR SDRAM module (bottom).
Two types of DIMMs (dual in-line memory modules): a 168-pin SDRAM module (top) and a 184-pin DDR SDRAM module (bottom).
Memory modules of SK Hynix
Memory modules of SK Hynix
A 256 x 4 Kibit 20-pin DIP DRAM on an early PC memory card, usually Industry Standard Architecture
A 256 x 4 Kibit 20-pin DIP DRAM on an early PC memory card, usually Industry Standard Architecture
Common DRAM packages. From top to bottom: DIP, SIPP, SIMM (30‑pin), SIMM (72‑pin), DIMM (168‑pin), DDR DIMM (184‑pin).
Common DRAM packages. From top to bottom: DIP, SIPP, SIMM (30‑pin), SIMM (72‑pin), DIMM (168‑pin), DDR DIMM (184‑pin).