memory module definition of memory module in the Free Online Encyclopedia.

memory module

A narrow printed circuit board that holds memory chips. The common memory module is the DIMM (dual in-line memory module). DIMMs with 184 pins are used for DDR SDRAM, while 240-pin DIMMs are used for DDR2 and DDR3 SDRAM. DDR, DDR2 and DDR3 DIMM modules are each keyed differently (notches in different locations) so that they cannot be inserted into the wrong slots. Because of space limitations, laptops use small outline DIMMs (SODIMMs).

PCs use either nine-bit memory (eight bits and parity) or eight-bit memory without parity. Macs use eight-bit memory without parity.

High-End Memory - ECC and RDIMMs
High-end servers and workstations may use error-correcting memory (ECC) and registered DIMMs (RDIMMs). Error correction detects one-bit errors, and RDIMMs increase reliability in high-density memory modules. See ECC memory and RDIMM.

Upgrading Memory - Read the Manual (RTFM!)
Earlier SIMM and Rambus modules were installed in pairs, whereas a single DIMM can often be used. However, installing pairs of DIMMs in machines that support dual channel DDR SDRAM increases performance. See SDRAM for details.

To upgrade memory, read your motherboard or system manual to learn which combinations of modules can be plugged into memory slots. There may be restrictions. See SDRAM, memory types and memory card.

Common Memory Modules

DIMMs are widely used in desktops and servers while the smaller SODIMMs are used in laptops. SIMMs were used in older PCs. For identification, look at the pin pattern and notches between the pins and on the sides. How the chips are laid out (horizontal or vertical) is up to the manufacturer.

Desktop Memory

To change memory on desktop computers, you have to open the cabinet and locate the slots. These three DIMM slots on this Mac motherboard are easy to find and reach.

Laptop Memory

To change memory on laptops, you have to unscrew a plate on the bottom of the machine to get to the SODIMM slots.

Two Sticks of Memory

Memory modules are often called "sticks," because the chips are housed on long, thin printed circuit boards.

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No references found	Auto-configuration files facilitate quick logic analyser setup); Interposer support for DIMMs (The solution supports a 240-pin, 933 MHz clock (1866 MT/s data rate), 64-/72-bit, Un-buffered Synchronous Double Date Rate 3 DRAM Dual In-Line Memory Module (DDR3 SDRAM DIMM); Interposer support for SODIMMs. Agilent and Nexus bring in DDR3 memory bus debug by CPI Financial These details will help to determine what memory module will better suit the Computer or Laptop for upgrading or replacement. DDR1 RAM or DDR2 RAM - What Is on My Computer? by John Jeyakumar / Computers and Internet community Kingston Technology claims it is the first to bring 100% production tested PC9600 and PC9200 high frequency HyperX memory modules to the market. Kingston Technology introduces 1.2 GHz DDR2 HyperX memory modules by Worldwide Computer Products News	memory core memory cycle memory cycle time memory dump memory dump routine memory effect memory element memory expansion card memory farts memory fill memory footprint memory gap memory guard memory hierarchy memory interleaving memory leak memory location memory lockout register memory management Memory Management Unit memory manager memory map memory map list memory mapped I/O memory mapping memory module memory module configurations memory overlay memory port memory power memory print memory printout memory protect Memory Protection memory RAID memory register memory resident memory scrubbing memory search routine memory smash memory sniffer memory sniffing Memory Stick memory storage memory switch memory trace memory tube memory twist Memory Type Range Registers memory types memory typewriter	memory lockout register Memory Look-Up memory loss memory lymphocyte memory lymphocyte memory lymphocyte Memory Lymphocyte Immuno-Stimulation Assay Memory management Memory management Memory Management Control Operations Memory management hardware Memory Management System Memory Management Toolkit Memory management unit Memory management unit Memory management units Memory manager Memory manager Memory map Memory map memory map list Memory Mapped File Memory mapped I/O Memory Mapped Input/Output Memory mapping Memory mapping Memory maps Memory maps Memory metal Memory Modeler Advanced Verification memory module memory module configurations Memory on Hand Memory Order Machine Clear Memory Organization Packet Memory Overhead Reduction Ratio memory overlay memory picture Memory Placement Optimization memory port memory power memory print memory printout Memory Production Logging Tool memory protect Memory protection Memory Protection Unit Memory Protocol Translator Device memory RAID Memory Re-Call Memory Read Memory Readout Memory Recall Memory Reference Code Memory Reference Reuse Latency

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Auto-configuration files facilitate quick logic analyser setup); Interposer support for DIMMs (The solution supports a 240-pin, 933 MHz clock (1866 MT/s data rate), 64-/72-bit, Un-buffered Synchronous Double Date Rate 3 DRAM Dual In-Line Memory Module (DDR3 SDRAM DIMM); Interposer support for SODIMMs.

Agilent and Nexus bring in DDR3 memory bus debug by CPI Financial

These details will help to determine what memory module will better suit the Computer or Laptop for upgrading or replacement.

DDR1 RAM or DDR2 RAM - What Is on My Computer? by John Jeyakumar / Computers and Internet community

Kingston Technology claims it is the first to bring 100% production tested PC9600 and PC9200 high frequency HyperX memory modules to the market.

Kingston Technology introduces 1.2 GHz DDR2 HyperX memory modules by Worldwide Computer Products News

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