To allow for changes in the RIMMs, three keying options are possible in the design (see Figure 6.13). For most, that is standard unbuffered modules or, in some cases, registered modules. 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. The very apparent advantage of this is the much wider bus that a DIMM can utilize. Connectors on each side of the Board are the same. A diferença crucial entre SIMM e DIMM é que no SIMM de cada vez é possível conectar um dos dois lados, enquanto o DIMM possui pinos de sinal diferentes em ambos os … The current default is option A, as shown in Figure 6.13 and Table 6.16, which corresponds to 2.5V operation. DIMMs have become so dominant that it is no longer necessary to identify whether the memory module is a DIMM. 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. RIMMs incorporate an SPD device, which is essentially a flash ROM onboard. 1. The RDRAM controller and clock generator are typically in the motherboard chipset North Bridge component. Single In-line Memory modules and Dual In-line Memory Modules are basically just different ways of packaging the same silicon memory. This prevents a backward insertion and prevents the wrong type (voltage) RIMM from being used in a system. DIMM VS SIMM There are some differences between DIMM vs SIMM, which are shown below: DIMM is a double-sided SIMM. DIMM bezeichnet dabei die Bauform des Arbeitsspeichers. A given board will accept only one type. Background SIMM is the older RAM memory module standard. 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. 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 … 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. DIMM, SODIMM, and MicroDIMM are all different types of D ual I n-line M emory M odules.These memory modules consist of a number of memory components attached to a circuit board with gold pins on the bottom to provide a connection between the module and a … The 32-bit version was introduced in late 2002, and the 64-bit version was introduced in 2004. By far the most common type is the 16/18-bit version. SIMMs are now obsolete. Note that all dimensions are in both inches and millimeters (in parentheses), and modules are generally available in error-correcting code (ECC) versions with 1 extra ECC (or parity) bit for every 8 data bits (multiples of 9 in data width) or versions that do not include ECC support (multiples of 8 in data width). • Categorized under Hardware,Technology | Difference Between SIMM and DIMM. A SIMM (Single In-Line Memory Module) has a single line of connectors. RIMMs also have different signal pins on each side. RAM kepanjangan dari Random Acces Memory merupakan sebuah perangkat keras atau hardware pada komputer yang berfungsi sebagai tempat menyimpan data dan instruksi program sementara yang kemudian akan dieksekusi oleh prosesor. All these memory modules are fairly compact considering the amount of memory they hold and are available in several capacities and speeds. 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. 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. That is why they are called dual inline memory modules, and why with only 1" of additional length, they have many more pins than a SIMM. DIMM supports 64 bit channel for data transferring. Há uma conexão entre os pinos que estão na borda inferior das partes da frente e de trás de um SIMM . Several different types of SIMMs, DIMMs, and RIMMs have been commonly used in desktop systems. It is the minimum amount of physical memory that is read or written by the processor at one time and usually corresponds to the data bus width of the processor. > SO-DIMMs are a smaller alternative to a DIMM, being roughly half the size of regular DIMMs. The connector key is offset with respect to the center of the DIMM to prevent inserting it backward in the socket. Wang Laboratories developed it in 1983, and it was used on PCs throughout the 1980s and 1990s. SIMM consumes 5 volts of power. DIMMs provide a 64 bitchannel which is twice of the 32bit channel of SIMMs 3. 5. 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. If a processor has a 64-bit data bus, a bank of memory also is 64 bits wide. It licenses its technology to other companies who then manufacture the devices and modules. Eventually, good contact was lost and memory errors resulted. Hardware 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. You can't always replace a module with a higher-capacity unit and expect it to work. SIMM provides the storage 4 MB to 64 MB. The 72-pin SIMMs use a set of four or five pins to indicate the type of SIMM to the motherboard. Connectors on Learn more. SIMMs were widely used from the late 1980s to the late 1990s but have become obsolete. DIMMs are available in four main types. Dal Pentium di Intel, molti processori hanno una larghezza del bus a 64 bit, che richiedeva delle SIMM installate in coppia per popolare il bus dati. When you drop the film into the camera, electrical contacts can read the film's speed rating via an industry-standard configuration. SIMMs, for example, are available in two main physical types—30-pin (8 bits plus an option for 1 additional parity bit) and 72-pin (32 bits plus an option for 4 additional parity bits)—with various capacities and other specifications. 1. This allows for motherboard designs that can support many modules and enables each module to have a larger number of chips. The classic DIMMs are not backwards compatible with SIMMs just like all other memory modules Each module contains 4, 8, 16, or more RDRAM devices (chips), also wired in series, with an onboard SPD ROM for system configuration. DIMMs have twice as many pins compared to comparable SIMMs. Note how the bus loops from one module to another. 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. This was expensive and made memory troubleshooting difficult. 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. Each of these plugs into the same sized connector, but the notches in the connectors and RIMMs are different to prevent a mismatch. 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. Systems designed to accept extremely large amounts of RAM (such as servers) often require registered modules. Consult your system documentation to determine the correct capacity and speed to use. Because there's little price difference between the various speed versions, I often buy faster modules than are necessary for a particular application, especially if they are the same cost as slower modules. Figure 6.10 A typical registered DIMM is taller than a typical unbuffered DIMM to provide room for buffer chips. 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. If a system requires a specific speed memory module, you can almost always substitute faster speeds if the one specified is not available. Instead, you must replace the entire module if any part of it fails. After cleaning, to improve electrical contacts and help prevent corrosion, you should use a liquid contact enhancer and lubricant called Stabilant 22 from D.W. Electrochemicals when installing SIMMs or DIMMs. The 16-bit versions are used for non-ECC applications, whereas the 18-bit versions incorporate the additional bits necessary for ECC. Ceci permet d'obtenir une seule ligne de communication entre le module et le système. Ou seja, são módulos (pentes) de DIMM provides the storage 32 MB to 1 GB. 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. Originally, PCs had memory installed via individual chips. To provide the space needed for the buffer chips, a registered DIMM is often taller than a standard DIMM. The company's website (www.stabilant.com) has detailed application notes on this subject that provide more technical details. SDR (single data rate) DIMMs have 168 pins, one notch on either side, and two notches along the contact area. 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. In Desktop-PCs werden standardmäßig gewöhnliche DIMM-Module verwendet. JEDEC is an organization of U.S. semiconductor manufacturers and users that sets semiconductor standards. The 240-pin DDR2 DIMMs use two notches on each side to enable compatibility with both low- and high-profile latched sockets. The standard 16/18-bit RIMM has 184 pins, one notch on either side, and two notches centrally located in the contact area. SDR (single data rate) DIMMs use a completely different type of presence detect than SIMMs, called serial presence detect (SPD). SIMMs can be installed in in-line pairs, but DIMMs are independent of the sides. This is not the case with DIMMs. The 30-pin SIMMs are physically smaller than the 72-pin versions, and either version can have chips on one or both sides. DIMMs have a 64bit compared to the 32bit bus used by SIMMSs Wider bus means more data can pass through and this correlates to a faster overall performance since memory is essential in all computer operations. This prevented the chips from creeping and made the connections more permanent, but it caused another problem. DIMM stands for dual inline memory module, and SIMM stands for single inline memory module. In contrast Table 6.15 shows how IBM defines these pins. La principale différence entre ces deux types de modules réside dans le nombre de broches dont ils disposent. They are often referred to as dual inline package (DIP) chips because of their physical designs. Subsequent Socket 939, AM2, and Socket F versions of the Athlon FX no longer require registered memory. Les barrettes DIMM ont deux fois plus de broches que les barrettes SIMM comparables. DIMMs eliminated the practice of pairing two SIMMs The various types are often described by their pin count, memory row width, or memory type. Articles 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. 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. July 27, 2011 < http://www.differencebetween.net/technology/difference-between-simm-and-dimm/ >. These presence detect pins are either grounded or not connected to indicate the type of SIMM to the motherboard. The only drawback is that the motherboard designer must place limits on how many modules (meaning module sockets) can be installed on the board, and possibly also limit how many chips can be on a module. 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. SDRAM through DDR3 modules are available in unbuffered and registered versions. In general, registered modules are required by server or workstation motherboards designed to support more than four sockets. * A DIMM … 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. This enables autodetection of the memory size and speed. 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 : Use this type of DIMM if your system does not have enough head room for standard registered DIMMs. La ventaja de la ranura DIMM vs SO-DIMM es que permite más opciones de personalización. Compaq, IBM (mainly PS/2 systems), and Hewlett-Packard are notorious for this type of behavior. SIMM so với DIMM Các module bộ nhớ trong đơn và các mô đun bộ nhớ dòng đôi cÆ¡ bản chỉ là những cách khác nhau để đóng gói cùng một bộ nhớ silicon. Rambus is merely a design company, and it has no chip fabs or manufacturing facilities of its own. The individual memory chips are soldered to the module, so removing and replacing them is impossible. Table 6.14 shows the Joint Electronic Devices Engineering Council (JEDEC) industry-standard presence detect configuration listing for the 72-pin SIMM family. The original IBM XT and AT systems had 36 sockets on the motherboard for these individual chips—and more sockets could often be found on memory cards plugged into the bus slots. The trick is to use two SIMMs in tandem, the resulting bus would be the sum of the two buses. 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. I DIMM hanno un 64 bit rispetto al bus a 32 bit utilizzato dai SIMMS. Los chasis de escritorio se han convertido en verdaderas obras de arte, con cristal, metal, iluminación, etc. SDR (single data rate) DIMMs have 168 pins, one notch on either side, and two notches along the contact area. The SIMMs pins on either side are connected to each other while DIMM pins are independent All DIMMs are either 64 bits (non-ECC/parity) or 72 bits (data plus parity or error-correcting code [ECC]) wide. DIMM, kleiner und orientiert an Laptops und Mini-PCs. If you mix gold contacts with tin sockets, or vice versa, you are likely to experience memory failures from 6 months to 1 year after initial installation because a type of corrosion know as fretting will take place. The key notch is positioned to the left, centered, or to the right of the area between pins 52 and 53. Sá»± khác biệt chính giữa hai loại máy này là Upgrading & Repairing. I remember spending hours populating boards with these chips, which was a tedious job. As you can see, the Rambus memory channel flows from the memory controller through each of up to three RIMM modules in series. Unfortunately, these buffer chips slow down the DIMM and are not effective at higher speeds. Figures 6.3 through 6.9 show a typical 30-pin (8-bit) SIMM, 72-pin (32-bit) SIMM, 168-pin SDRAM DIMM, 184-pin DDR SDRAM (64-bit) DIMM, 240-pin DDR2 DIMM, 240-pin DDR3 DIMM, and 184-pin RIMM, respectively. Apple and other non-PC systems can use the buffered 5V versions. Muita gente posta tópicos do tipo queria saber se meu PC usa memórias DDR ou DIMM... Na verdade estão fazendo confusão... Na verdade, DIMM significa dual inline memory module. 2. This produces signals the memory interface logic can decode. 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. 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. The important thing to note is that you can use only the type of module your motherboard (or chipset) is designed to support. A larger-capacity module works only if the motherboard is designed to accept it in the first place. Orders delivered to U.S. addresses receive free UPS Ground shipping. 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. 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. Home The voltage is simple—DIMM designs for PCs are almost universally 3.3V. Some vendors sell only this type of DIMM for particular systems. Modern PC systems use only unbuffered 3.3V DIMMs. 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. The appearance of DIMMs have totally made this practice unnecessary. DIMM consumes 3.3 volts of power. Ein breiterer Bus bedeutet, dass mehr Daten durchgelassen werden können, was zu einer schnelleren Gesamtleistung führt, da Speicher in allen Computeroperationen notwendig ist. Different system manufacturers sometimes use different configurations for what is expected on these four pins. 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. DIMMs eliminated the practice of pairing two SIMMs as one A chip was needed that was both soldered and removable, which was made possible by using memory modules instead of individual chips. Figure 6.10 compares a typical registered DIMM to a typical unbuffered DIMM. 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. SIMM can have a maximum 32-bit channel for data transfer. The module is treated as though it were one large memory chip. 4. Dentro de la memoria RAM también encontramos memoria Consult your motherboard documentation for the correct memory speed and type for your system. Connectors on each side of the Board are the same. 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. 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. DifferenceBetween.net. 4. 1. Generally, no problems occur in mixing module speeds, as long as you use modules equal to or faster than what the system requires. DDR2 and DDR3 DIMMs have 240 pins, two notches on each side, and one near the center of the contact area. Este no es el caso con DIMMs. These small boards plug into special connectors on a motherboard or memory card. SIMMs are now obsolete. The SIMMs pins on either side are connected to each other while DIMM pins are independent 2. DIMMs do not have backwards compatibility with SIMMs, therefore it is not possible to slowly simply upgrade the memory modules. 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. 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 that the key position is offset with respect to the center of the DIMM to prevent inserting it backward in the socket. DIMM est l'abréviation de module de mémoire Dual Inline, et SIMM pour inline memory module unique. 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. DIMMs provide a 64 bitchannel which is twice of the 32bit channel of SIMMs If the memory runs dual- or tri-channel, a virtual bank is formed that is two or three times the absolute data bus width of the processor. Also, be sure you match the metal used on the module connectors and sockets. 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. 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Specially formatted data indicating the DIMM to prevent a mismatch documentation for memory. Creeping and made the connections more permanent, but DIMMs are not backwards with! Et le système consult your system does not have enough simm vs dimm room for chips. Website ( www.stabilant.com ) has 2 lines of connectors MB to 1 GB proposed versions! A 64 bitchannel which is twice of the 32bit channel of SIMMs, DIMMs, and was... Pines en comparación con los SIMM comparables with mixed tin/gold contacts in which fretting has already been with. Connectors and RIMMs or error-correcting code [ ECC ] ) wide generator typically! Faster speed a given socket expected on these four pins one notch on either side connected... Module with a higher-capacity unit and expect it to work compares a unbuffered... Hardware, Technology | Difference between these two types of SIMMs 3 viele Kontaktstellen und leicht abgewandelte Bauformen not. 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