SIMM can have a maximum 32-bit channel for data transfer. Pengertian dan Perbedaan Memori RAM DIMM dan RAM SODIMM – Apa itu RAM ? The pins are numbered from left to right and are connected through to both sides of the module on the SIMMs. 1. Also, be sure you match the metal used on the module connectors and sockets. In many ways, the presence detect pin function is similar to the industry-standard DX coding used on modern 35mm film rolls to indicate the ASA (speed) rating of the film to the camera. They are often referred to as dual inline package (DIP) chips because of their physical designs. Note that the key position is offset with respect to the center of the DIMM to prevent inserting it backward in the socket. The 30-pin SIMMs are physically smaller than the 72-pin versions, and either version can have chips on one or both sides. A dual-rank DIMM module has two complete 64-bit wide banks of chips logically stacked so that the module is twice as deep (has twice as many 64-bit rows). It consists of a small EEPROM or flash memory chip on the DIMM that contains specially formatted data indicating the DIMM's features. The 16-bit versions are used for non-ECC applications, whereas the 18-bit versions incorporate the additional bits necessary for ECC. The key notch is positioned in the center of the area between pins 64 and 65 on the front (184/185 on the back), and there is no voltage keying because all DDR2 DIMMs run on 1.8V. This might not seem likely at first since it is clearly visible that they have the same number of pins at each side, but closer inspection reveals that the connectors on either side are connected to each other in SIMMs. DIMM, kleiner und orientiert an Laptops und Mini-PCs. DIMMs are available in four main types. The memory controller automatically reads the data from the SPD ROM to configure the system to match the RIMMs installed. 4. Instead, you must replace the entire module if any part of it fails. All DIMMs are either 64 bits (non-ECC/parity) or 72 bits (data plus parity or error-correcting code [ECC]) wide. DDR (double data rate) DIMMs, on the other hand, have 184 pins, two notches on each side, and only one offset notch along the contact area. SDR (single data rate) DIMMs use a completely different type of presence detect than SIMMs, called serial presence detect (SPD). and updated on July 27, 2011, Difference Between Similar Terms and Objects, Difference Between Sony Cybershot S Series and W Series, Difference Between Samsung Galaxy S3 and iPhone 5, Difference Between Samsung Galaxy S2 (Galaxy S II) and Galaxy S 4G, Difference Between Crossover Cable and Ethernet Cable, Difference Between Parallel Port and Serial Port, Difference Between Ultrabook and Notebook, Difference Between Microcomputer and Supercomputer, Difference Between Super Retina and Liquid Retina, Difference Between Vitamin D and Vitamin D3, Difference Between LCD and LED Televisions, Difference Between Mark Zuckerberg and Bill Gates, Difference Between Civil War and Revolution. Al igual que sus predecesores SIMM (Single In-Line Memory Module) tenían también contactos a ambos lados del PCB del módulo de memoria. DIMMs provide a 64 bitchannel which is twice of the 32bit channel of SIMMs 3. You can't always replace a module with a higher-capacity unit and expect it to work. RIMMs also have different signal pins on each side. The main physical difference between SIMMs and DIMMs is that DIMMs have different signal pins on each side of the module, resulting in two rows of electrical contacts. Use this type of DIMM if your system does not have enough head room for standard registered DIMMs. Presence detect outputs must be tied to the ground through a 0-ohm resistor or jumper on the SIMM—to generate a high logic level when the pin is open or a low logic level when the motherboard grounds the pin. Although very few (if any) of these systems are still in service, keep this information in mind if you are moving 72-pin modules from one system to another or are installing salvaged memory into a system. The alternative to this at the time was to have the memory soldered into either the motherboard or an expansion card. Home So-called double-sided modules that really have multiple banks of chips onboard might be restricted on some systems in certain combinations. SIMM vs DIMM DIMM est l'abréviation de module de mémoire Dual Inline, et SIMM pour inline memory module unique. If a chip did go bad, you had to attempt desoldering the old one and resoldering a new one or resort to scrapping the motherboard or memory card on which the chip was installed. SIMM provides the storage 4 MB to 64 MB. The connector key is offset with respect to the center of the DIMM to prevent inserting it backward in the socket. The 240-pin DDR2 DIMMs use two notches on each side to enable compatibility with both low- and high-profile latched sockets. La ventaja de la ranura DIMM vs SO-DIMM es que permite más opciones de personalización. 2. A SO-DIMM, SODIMM, or small outline dual in-line memory module, is a type of computer memory built using integrated circuits. The SIMMs pins on either side are connected to each other while DIMM pins are independent Subsequent Socket 939, AM2, and Socket F versions of the Athlon FX no longer require registered memory. DDR2 and DDR3 DIMMs have 240 pins, two notches on each side, and one near the center of the contact area. The current default is option A, as shown in Figure 6.13 and Table 6.16, which corresponds to 2.5V operation. The pins on the DIMM are different on each side, but on a SIMM, each side is the same as the other and the connections carry through. A chip was needed that was both soldered and removable, which was made possible by using memory modules instead of individual chips. DIMMs have twice as many pins compared to comparable SIMMs. Besides being a time-consuming and labor-intensive way to deal with memory, DIP chips had one notorious problem—they crept out of their sockets over time as the system went through thermal cycles. The RDRAM controller and clock generator are typically in the motherboard chipset North Bridge component. The company's website (www.stabilant.com) has detailed application notes on this subject that provide more technical details. Je nach Typ (DDR2-RAM, DDR3-RAM, DDR4-RAM) haben sie verschieden viele Kontaktstellen und leicht abgewandelte Bauformen. This allows for motherboard designs that can support many modules and enables each module to have a larger number of chips. Systems might have specific design limitations for the maximum capacity of module they can take. Background SIMM is the older RAM memory module standard. The various types are often described by their pin count, memory row width, or memory type. I remember spending hours populating boards with these chips, which was a tedious job. Aunque hay algunas raras excepciones, lo más normal es que todos los PCs de sobremesa soporten únicamente memoria RAM en formato DIMM, mientras que en el caso de los portátiles, el tipo de memoria soportada es SO-DIMM. RIMMs incorporate an SPD device, which is essentially a flash ROM onboard. The appearance of DIMMs have totally made this practice unnecessary. DIMMs haben 64 Bit im Vergleich zum 32-Bit-Bus, der von SIMMS verwendet wird. The gold or tin pins on the lower edge of the front and back of a SIMM are connected, providing a single communication path between the module and the system. Los chasis de escritorio se han convertido en verdaderas obras de arte, con cristal, metal, iluminación, etc. This enables the memory bus to remain continuous from the controller through each module (and, therefore, each RDRAM device on the module) until the bus finally terminates on the motherboard. Consult your motherboard documentation for the correct memory speed and type for your system. This might make them more usable in a future system that could require the faster speed. This prevented the chips from creeping and made the connections more permanent, but it caused another problem. 1. DIMMs have replaced all SIMMs in computers today and the only place that you would probably see SIMMs would be at computer museums. The primary difference between these two types of modules is in the number of pins that they have. The trick is to use two SIMMs in tandem, the resulting bus would be the sum of the two buses. If a processor has a 64-bit data bus, a bank of memory also is 64 bits wide. July 27, 2011 < http://www.differencebetween.net/technology/difference-between-simm-and-dimm/ >. Figure 6.14 shows a typical PC RIMM installation. 簡単な説明としては、SRAM,DRAMは、メモリーの種類で、SIMM、DIMMはメモリー (モジュール）の形状の種類ですね。 DIMMs do not have backwards compatibility with SIMMs, therefore it is not possible to slowly simply upgrade the memory modules. SIMM pins can be tin or gold plated, and the plating on the module pins must match that on the socket pins; otherwise, corrosion will result. This produces signals the memory interface logic can decode. Hardware It licenses its technology to other companies who then manufacture the devices and modules. A larger-capacity module works only if the motherboard is designed to accept it in the first place. Die Abkürzung DIMM steht für Dual Inline Memory Module (Deutsch: doppelreihiges Arbeitsspeicher-Modul, auch RAM genannt). Figure 6.10 compares a typical registered DIMM to a typical unbuffered DIMM. Ceci permet d'obtenir une seule ligne de communication entre le module et le système. Determining a Memory Module's Size and Features, Upgrading and Repairing PCs, 19th Edition, www.tycoelectronics.com/documentation/whitepapers/pdf/aurulrep.pdf, www.tycoelectronics.com/documentation/whitepapers/pdf/sncomrep.pdf, Upgrading and Repairing PCs, 22nd Edition, Fixing Your Computer Absolute Beginner's Guide, Mobile Application Development & Programming. Unfortunately, these buffer chips slow down the DIMM and are not effective at higher speeds. SDRAM through DDR3 modules are available in unbuffered and registered versions. JEDEC is an organization of U.S. semiconductor manufacturers and users that sets semiconductor standards. 5. Sá»± khác biệt chính giữa hai loại máy này là According to connector manufacturer AMP's "Golden Rules: Guidelines for the Use of Gold on Connector Contacts" (available at www.tycoelectronics.com/documentation/whitepapers/pdf/aurulrep.pdf) and "The Tin Commandments: Guidelines for the Use of Tin on Connector Contacts" (available at www.tycoelectronics.com/documentation/whitepapers/pdf/sncomrep.pdf), you should match connector metals. Notify me of followup comments via e-mail, Written by : Ben Joan. Connectors on each side of the Board are the same. A bank is the smallest amount of memory needed to form a single row of memory addressable by the processor. Please note: comment moderation is enabled and may delay your comment. "Difference Between SIMM and DIMM." There is confusion among users and even in the industry regarding the terms single-sided and double-sided with respect to memory modules. Upgrading & Repairing. This was expensive and made memory troubleshooting difficult. A parte de estos dos tipos de memoria, existen muchas características como el tipo DDR, DDR3, DDR4 y muchos tamaños de módulo como SODIMM Long DIMM etc. Dentro de la memoria RAM también encontramos memoria DIMM consumes 3.3 volts of power. As such, presence detect signaling is not a standard throughout the PC industry. Key Differences Between SIMM and DIMM A DIMM is double sided SIMM, as SIMM can be installed in in-line pairs while DIMM is independent of the side. Modern PC systems use only unbuffered 3.3V DIMMs. In truth, the single- or double-sided designation actually has nothing to do with whether chips are physically located on one or both sides of the module, and it has nothing to do with whether the module is a SIMM or DIMM (meaning whether the connection pins are single- or double-inline). In most (but not all) cases, this requires chips to be on both sides of the module; therefore, the term double-sided has often been used to indicate that a module has two ranks, even though the term is technically incorrect. Interestingly, Rambus does not manufacture the RDRAM devices (the chips) or the RIMMs; that is left to other companies. The classic Single-rank modules (incorrectly referred to as single-sided) can also have chips physically mounted on both sides of the module, and dual-rank modules can have chips physically mounted on only one side. Memory Module DIMM, SODIMM, Mini-DIMM,Micro-DIMM Converters Tuesday, October 6, 2009 Most personal Computers (PCs), servers and work stations uses DRAM memory chips mounted on small, removable memory modules. En este artículo vamos a contarte las diferencias entre la memoria RAM DIMM vs SO-DIMM, y por qué los portátiles y mini PCs usan RAM de este segundo tipo. This serial data can be read via the serial data pins on the DIMM, and it enables the motherboard to autoconfigure to the exact type of DIMM installed. DDR DIMMs also use two notches on each side to enable compatibility with both low- and high-profile latched sockets. Summary: To allow for changes in the RIMMs, three keying options are possible in the design (see Figure 6.13). Ou seja, são módulos (pentes) de Esta estética gaming ha llegado a todos los componentes electrónicos, incluso a las memorias RAM DIMM, las cuales presentan disipadores de aluminio súper personalizados e … Each of these plugs into the same sized connector, but the notches in the connectors and RIMMs are different to prevent a mismatch. A SIMM (single in-line memory module) is a type of memory module containing random-access memory used in computers from the early 1980s to the late 1990s. To provide the space needed for the buffer chips, a registered DIMM is often taller than a standard DIMM. Early modules had one row of electrical contacts and were called SIMMs (single inline memory modules), whereas later modules had two rows and were called DIMMs (dual inline memory modules) or RIMMs (Rambus inline memory modules). The 240-pin DDR3 DIMMs use two notches on each side to enable compatibility with both low- and high-profile latched sockets. Table 6.13 lists the various capacities available for SIMMs, DIMMs, and RIMMs. Three different physical types of RIMMs are available: a 16/18-bit version with 184 pins, a 32/36-bit version with 232 pins, and a 64/72-bit version with 326 pins. DIMMs have become so dominant that it is no longer necessary to identify whether the memory module is a DIMM. DIMMs provide a 64 bitchannel which is twice of the 32bit channel of SIMMs Esto puede parecer poco probable al principio, ya que es claramente visible que tienen la misma cantidad de pines en cada lado, pero una inspección más cercana revela que los conectores de cada lado están conectados entre sí en los SIMM. Moving from SIMMs to DIMMs required a replacement of the motherboard which could sometimes mean the replacement of the processor. In diesem Artikel werden wir Ihnen die Unterschiede zwischen erklären RAM DIMM vs SO-DIMM und warum Laptops und Mini-PCs RAM dieses zweiten Typs verwenden. La principale différence entre ces deux types de modules réside dans le nombre de broches dont ils disposent. This has been a major problem with 72-pin SIMM-based systems because some memory and motherboard vendors opted for tin sockets and connectors while others opted for gold. When you drop the film into the camera, electrical contacts can read the film's speed rating via an industry-standard configuration. SDR (single data rate) DIMMs have 168 pins, one notch on either side, and two notches along the contact area. Since the DIMM has If a system requires a specific speed memory module, you can almost always substitute faster speeds if the one specified is not available. Because these pins can have custom variations, you often must specify IBM, Compaq, HP, or generic SIMMs when you order memory for systems using 72-pin SIMMs. The important thing to note is that you can use only the type of module your motherboard (or chipset) is designed to support. The key notch is positioned to the left, centered, or to the right of the area between pins 52 and 53. Há uma conexão entre os pinos que estão na borda inferior das partes da frente e de trás de um SIMM . There is no need to resubmit your comment. 2. DIMM bezeichnet dabei die Bauform des Arbeitsspeichers. Originally, PCs had memory installed via individual chips. This ROM contains information about the RIMM's size and type, including detailed timing information for the memory controller. Figure 6.11 The 168-pin DRAM DIMM notch key definitions. The module is treated as though it were one large memory chip. Articles The 184-pin DDR DIMMs use a single key notch to indicate voltage, as shown in Figure 6.12. To have the most reliable system when using SIMM modules, you must install modules with gold-plated contacts into gold-plated sockets and modules with tin-plated contacts into tin-plated sockets only. This is not only the cheapest design, but also the fastest and most efficient. Presence detect performs the same function for 72-pin SIMMs that the serial presence detect (SPD) chip does for DIMMs. Un bus più ampio significa che possono passare più dati e questo è correlato a una prestazione generale più rapida, poiché la memoria è essenziale in tutte le operazioni del computer. DifferenceBetween.net. These presence detect pins are either grounded or not connected to indicate the type of SIMM to the motherboard. Figure 6.10 A typical registered DIMM is taller than a typical unbuffered DIMM to provide room for buffer chips. Because SDRAM and newer modules have an onboard serial presence detect (SPD) ROM that reports their speed and timing parameters to the system, most systems run the memory controller and memory bus at the speed matching the slowest module installed. If the motherboard uses presence detect signals, a power-on self test (POST) procedure can determine the size and speed of the installed SIMMs and adjust control and addressing signals automatically. For most, that is standard unbuffered modules or, in some cases, registered modules. SIMMs were widely used from the late 1980s to the late 1990s but have become obsolete. Instead the terms single-sided and double-sided are used to indicate whether the module has one or two internal banks (called ranks) of memory chips installed. As you can see, the Rambus memory channel flows from the memory controller through each of up to three RIMM modules in series. Fortunately, reseating all the chips back in their sockets usually rectified the problem, but that method was labor intensive if you had a lot of systems to support. These small boards plug into special connectors on a motherboard or memory card. Many of the systems from these vendors require special SIMMs that are basically the same as standard 72-pin SIMMs, except for special presence detect requirements. SIMMs are now obsolete. DIMM según sus Siglas en Inglés: Dual In-Line Memory Module, y en Español: Módulo de Memoria con Contactos Duales. The registers temporarily hold data passing to and from the memory chips and enable many more RAM chips to be driven or otherwise placed on the module than the chipset could normally support. One anomaly is the initial version of the AMD Athlon 64 FX processor, which also uses registered memory because its Socket 940 design was based on the AMD Opteron workstation and server processor. DIMMs are available in four main types. DIMM 就從 Pentium 開始一直存活至今，記憶體資料匯流排的寬度始終維持在 64bit，甚至是未來的 DDR4 依然保留此設計。 1 片同時擁有 SIMM 和 DIMM 插槽的主機板，最上方的黑色插槽為 DIMM，往下的白色插槽為 SIMM ： The SIMMs pins on either side are connected to each other while DIMM pins are independent 2. Compaq, IBM (mainly PS/2 systems), and Hewlett-Packard are notorious for this type of behavior. 5. Systems designed to accept extremely large amounts of RAM (such as servers) often require registered modules. DIMMs can come in several varieties, including unbuffered and buffered as well as 3.3V and 5V. SO-DIMMs are a smaller alternative to a DIMM, being roughly half the size of regular DIMMs. • Categorized under Hardware,Technology | Difference Between SIMM and DIMM. * A SIMM (Single In-Line Memory Module) has a single line of connectors. If you install a 5V DIMM in a 3.3V socket, it would be damaged, but fortunately keying in the socket and on the DIMM prevents that. There is no replacement to DIMMs at the moment and it is expected that memory modules would still be manufactured as DIMMs in the foreseeable future. Note how the bus loops from one module to another. The 16/18-bit RIMMs are keyed with two notches in the center. Table 6.15 shows how IBM defines these pins. Ein breiterer Bus bedeutet, dass mehr Daten durchgelassen werden können, was zu einer schnelleren Gesamtleistung führt, da Speicher in allen Computeroperationen notwendig ist. Consult your system documentation to determine the correct capacity and speed to use. Memory modules of each type and capacity are available in various speed ratings. The individual memory chips are soldered to the module, so removing and replacing them is impossible. Learn more. Il existe un lien entre les broches qui sont sur le bord inférieur de la partie arrière d'un module SIMM avant et arrière. SDR (single data rate) DIMMs have 168 pins, one notch on either side, and two notches along the contact area. This prevents inserting a DIMM of the wrong type into a given socket. The left key (indicated as "DATUM A" in Figure 6.13) is fixed in position, but the center key can be in three different positions spaced 1mm or 2mm to the right, indicating different types of RIMMs. 3. > Table 6.14 shows the Joint Electronic Devices Engineering Council (JEDEC) industry-standard presence detect configuration listing for the 72-pin SIMM family. Most PC motherboards are designed to use unbuffered modules, which allow the memory controller signals to pass directly to the memory chips on the module with no interference. Every day, when you powered the system on and off, the system heated and cooled, and the chips gradually walked their way out of the sockets—a phenomenon called chip creep. DIMM vs SO-DIMM: Characteristics, Definition and Differences May 19, 2020 Matt Mills Hardware 0 When we talk about RAM oriented to the consumer (we, the users), we can find it in two different formats: either in DIMM format, which is the usual “full … The key notch is positioned in the center of the area between pins 48 and 49 on the front (168/169 on the back), and there is no voltage keying because all DDR3 DIMMs run on 1.5V. Some vendors sell only this type of DIMM for particular systems. SIMMs are now obsolete. The voltage is simple—DIMM designs for PCs are almost universally 3.3V. This enables autodetection of the memory size and speed. 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