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Two types of DIMMs (dual in-line memory modules): a 168-pin SDRAM module (top) and a 184-pin DDR SDRAM module (bottom). In computing, a memory module or RAM (random-access memory) stick is a printed circuit board on which memory integrated circuits are mounted.[1] Memory modules permit easy installation and replacement in electronic systems, especially computers such as personal computers, workstations, and servers. The first memory modules were proprietary designs that were specific to a model of computer from a specific manufacturer. Later, memory modules were standardized by organizations such as JEDEC and could be used in any system designed to use them. Types of memory module include:
Distinguishing characteristics of computer memory modules include voltage, capacity, speed (i.e., bit rate), and form factor. For economic reasons, the large (main) memories found in personal computers, workstations, and non-handheld game-consoles (such as PlayStation and Xbox) normally consist of dynamic RAM (DRAM). Other parts of the computer, such as cache memories normally use static RAM (SRAM). Small amounts of SRAM are sometimes used in the same package as DRAM.[2] However, since SRAM has high leakage power and low density, die-stacked DRAM has recently been used for designing multi-megabyte sized processor caches.[3] Physically, most DRAM is packaged in black epoxy resin. General DRAM formats[edit]Common DRAM packages. From top to bottom: DIP, SIPP, SIMM (30‑pin), SIMM (72‑pin), DIMM (168‑pin), DDR DIMM (184‑pin). Dynamic random access memory is produced as integrated circuits (ICs) bonded and mounted into plastic packages with metal pins for connection to control signals and buses. In early use individual DRAM ICs were usually either installed directly to the motherboard or on ISA expansion cards; later they were assembled into multi-chip plug-in modules (DIMMs, SIMMs, etc.). Some standard module types are:
Common DRAM modules[edit]Common DRAM packages as illustrated to the right, from top to bottom (last three types are not present in the group picture, and the last type is available in a separate picture):
Common SO-DIMM DRAM modules:
References[edit]
Which memory module form factors are used in laptop computers?Currently the most common type of memory module used in PCs is the DIMM (Dual In-Line Memory Module), which is capable of transferring 64 bits of data per cycle. The memory modules used in notebooks can be regarded as smaller versions of desktop memory modules.
What kind of memory does a laptop typically use?As mentioned, DDR4 is the norm in almost all current laptops and desktops. The basic data rate standard for DDR4 memory is 2,133MT/s (that is, million transfers per second), which transfers at double the clock frequency of 1,066MHz.
Which of the following form factors is most commonly used in laptop computers?Which of the following form factors is most commonly used in laptop computers? SSD, SSHD, and magnetic drives that are to be used in a laptop most commonly use the 2.5 inch form factor.
What kind of memory card does a laptop typically use quizlet?Terms in this set (11) SODIMM(small outline dual in-line memory module) is the most commonly used RAM by laptops.
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