Sign In | My Account Live chat by SightMax 1.866.839.5875
Search by: Products Computer
Check Out  Check Out
Sales & Specials
To learn about sales and specials, sign up for the OEM Newsletter!
Email
 
OEMPCWorld.com recognized by BizRate Circle of Excellence 2009


Company Profile

Images and Descriptions - Memory Module Types

72-pin SIMM
72-pin SIMM
Approximately 4.25” x 1”

A 72Pin SIMM has 72 pins on the bottom of the circuit board, 36 on each side  There is a notch cut in the bottom of the circuit board in the mi dd le.  These modules measure 4.25 inches long.  Because the notch is not centered they can only be put in one way.

72-pin SIMMs are found in older desktop 486 and Pentium computers. Each 72-pin SIMM provides a 32-bit data path, so they can be installed alone in 32-bit systems (486 models) but must be installed in pairs in 64-bit Pentium or AMD Athlon systems. They are available in FPM or EDO. 

168-pin DIMM
168 pin DIMM
Approximately 5.375” x 1.375”

The DIMM is larger than either of the SIMMs.  They contain 168 pins on the bottom of the circuit board.  There are two notches on the bottom of the board and they must be aligned properly in order for them to be inserted.  These memory modules are primarily used in newer computers and can be inserted one at a time unlike the SIMMs, which have to be inserted in pairs.

168-pin DIMMs are found in Pentium and Athlon systems. Each 168-pin DIMM provides a 64-bit data path, so they are installed alone in 64-bit systems. 168-pin DIMMs are available in FPM, EDO, PC66, PC100 and PC133.

The number of chips on a 168-pin DIMM may vary, but they have 84 pins on the front and 84 pins on the back for a total of 168. 168-pin DIMMs are 5.375" long and 1.375" high, and the heights may vary. They have two small notches within the row of pins along the bottom of the module.

184-pin DIMM DDR
184-pin DIMM for DDR memory
Approximately 5.375” x 1.25”

The DIMM is larger than either of the SIMMs.  They contain 184 pins on the bottom of the circuit board.  There is one notche on the bottom of the board and it must be aligned properly in order for them to be inserted.  These memory modules are primarily used in newer computers and can be inserted one at a time unlike the SIMMs, which have to be inserted in pairs.

184-pin DIMMs are for DDR SDRAM modules found in Pentium III and 4 and Athlon systems. Each 184-pin DIMM provides a 64-bit data path, so they are installed alone in 64-bit systems. 168-pin DIMMs are available in PC2100, PC2700, PC3200 and PC3500 and later..

The number of chips on a 184-pin DIMM may vary, but they have 92 pins on the front and 92 pins on the back for a total of 184. 184-pin DIMMs are 5.375" long and 1.375" high, and the heights may vary. They have one small notche within the row of pins along the bottom of the module.

184-pin Rambus RDRAM RIMM
Rambus 184 pin RDRAM RIMM
Approximately 5.25” x 1.25”

The Rambus ® RIMM™ module is a general purpose high-performance memory module suitable for use in a broad range of applications including computer memory, personal computers, workstations, and other applications where high bandwidth and low latency are required. 

Features
High speed 1066, 800, 711 and 600 MHz RDRAM storage
184 edge connector pads with 1mm pad spacing
Maximum module PCB size: 133.5mm x 31.75mm x 1.37mm (5.25" x 1.25" x 0.05")
Each RDRAM has 16 banks, for a total of 256, 192, 128, 96, or 64 banks on each 128MB, 96MB, 64MB, 48MB, or 32MB module respectively
Gold plated edge connector pad contacts
Serial Presence Detect (SPD) support
Operates from a 2.5 volt supply (±5%)
Low power and power down self refresh modes
Separate Row and Column buses for higher efficiency

RDRAM delivers pure performance where it matters most: leading-edge applications. Whether on multimedia, network packet switching, content creation, etc., RDRAM unleashes the processing power of your system. High-bandwidth RDRAM is essential to drive top performing processors. RDRAM provides a flexible solution to meet bandwidth requirements of tomorrow's high performance systems. RDRAMs system solution scales easily from 800Mhz to 1066Mhz to 1200Mhz. Additionally, commodity RDRAM components are configurable in a range of RIMM module configurations from 16 to 32 and 64 bit data busses. These RIMM module solutions offer up to 9.6 GByte/second of memory performance while retaining standard PC form factors.

240-pin DIMM

Approximately 5.25" X 1.18"

A dual inline memory module (DIMM) consists of a number of memory components attached to a printed circuit board. The gold pins on the bottom of the DIMM provide a connection between the module and a socket on a printed circuit board. The pins on the front and back of a DIMM are not connected to each other.

DDR2 SDRAM use 240-pin DIMM sockets for desktop computers. Each 240-pin DIMM provides a 64-bit data path (72-bit for ECC or registered modules), so they are installed one at a time in 64-bit systems. DDR2 chipsets are expected to support dual-channel memory, providing a 128-bit data path.

240-pin DIMMs are available in DDR2 or DDR3 SDRAM.

Memory modules (Unbuffered, Registered, Small Outline DIMMs) have a special “key” or notch in their connector. These keys must align with a key in the memory socket to allow the module to be inserted. All DDR3 and DDR2 module types are keyed differently.

To use DDR2 memory, your system motherboard must have 240-pin DIMM slots and a DDR2-enabled chipset. A DDR2 SDRAM DIMM will not fit into a standard SDRAM DIMM socket or a DDR DIMM socket. DDR2 modules use a 1.8V power supply, providing a big power saving over the 2.5V DDR modules.

To use DDR3 memory, your system motherboard must have 240-pin DIMM slots and a DDR3-enabled chipset. A DDR3 SDRAM DIMM will not fit into a standard SDRAM DIMM socket, DDR DIMM socket or DDR2 socket. DDR2 modules use a 1.5V power supply, providing a big power saving over the 2.5V DDR modules or 1.8V DDR2 modules. DDR3 is the next generation of Double Data Rate (DDR) Synchronous Dynamic Random Access Memory (SDRAM). It is an evolution of DDR and DDR2 memory technology that delivers higher speeds, lower power consumption and heat dissipation.

The number of components on a 240-pin DIMM may vary, but they always have 120 pins on the front and 120 pins on the back. 240-pin DIMMs are approximately 5.25" long and 1.18" high, though the heights may vary. While 240-pin DDR2 DIMMs, 184-pin DDR DIMMs and 168-pin DIMMs are approximately the same size, 240-pin DIMMs and 184-pin DIMMs have only one notch within the row of pins. The notch in a 240-pin DDR2 DIMM is slightly more toward the center of the module.

100-pin DIMM

Approximately 3.5" x 1.25"

A dual inline memory module (DIMM) consists of a number of memory chips that are attached to a printed circuit board . The gold pins on the bottom of the DIMM provide a connection between the module and a socket on a larger printed circuit board. The pins on the front and back of a DIMM are not connected.

100-pin DIMMs are ussualy used in printers. The number of black chips on a 100-pin DIMM can vary, but it always has 50 pins on the front and 50 pins on the back, for a total of 100. 100-pin DIMMs are approximately 3.5 inches long and 1.25 inches high, and the heights may vary. They have two small notches within the row of pins along the bottom of the module.

172-pin MicroDIMM DDR

Approximately 1.67” x 1.18”

The number of chips on a 172-pin MicroDIMM can vary, but they always have 86 pins on the front and 86 pins on the back for a total of 172. 172-pin MicroDIMMs are approximately 1.67 inches long and 1.18 inch high, though the heights can vary. Unlike SODIMMs, MicroDIMMs do not have any notches along the bottom edge

214-pin MicroDIMM DDR2

Approximately 2.165” x 1.18”

The number of chips on a 214-pin MicroDIMM can vary.. 214-pin MicroDIMMs are approximately 2.165" long and 1.18" high, though the heights can vary. Unlike SODIMMs, MicroDIMMs do not have any notches along the bottom edge and uses a new 2 piece type of connector known as the " Mezzanine Socket.

144-pin SODIMM
144-pin sodimm
Approximately 2.625” x 1”

The SODIMM is a smaller version of the DIMM.  They are primarily used in Laptop although they are used in some others like the original tray-loading iMac computer.  They have a notch in the bottom of the circuit board, which is offset from the mi dd le, which makes inserting it easier to line up.

144-pin SODIMMs are commonly found in laptop computers. Each 144-pin SODIMM provides a 64-bit data path, so they are installed alone in 64-bit systems. 144-pin SODIMMs are available in FPM, EDO, PC66, PC100 and PC133. 

The number of black chips on a 144-pin SODIMM may vary, but they always have 72 pins on the front and 72 pins on the back for a total of 144. 144-pin SODIMMs are approximately 2.625" long and 1" high, and the heights may vary. They have one small notch within the row of pins along the bottom of the module.

200-pin SODIMM
200-pin SODIMM
Approximately 2.625” x 1”

The SODIMM is a smaller version of the DIMM.  They are primarily used in Laptop systems.  They have a notch in the bottom of the circuit board, which is offset from the mi dd le, which makes inserting it easier to line up.

200-pin SODIMMs are used to provide DDR SDRAM memory for laptop computers. Each 200-pin SODIMM provides a 64-bit data path, so they are installed alone in 64-bit systems. 200-pin SODIMMs are available in PC2100 and PC2700. 

The number of black chips on a 200-pin SODIMM may vary, but they always have 100 pins on the front and 100 pins on the back for a total of 200. 200-pin SODIMMs are approximately 2.625" long and 1" high, and the heights may vary.

204-pin SODIMM

Approximately 2.6" X 1.75" (66 mm X 44.45 mm)

204-pin small outline dual inline memory modules (SODIMMs) are the form factor used to provide DDR3 memory modules for notebook computers and other small form factor computing platforms. 204-pin SODIMMs are currently available in PC3-8500 (DDR3 1066MHz) speeds.

To use DDR3 memory, your system must have both a 204-pin SODIMM slot and a chipset that supports DDR3 memory. A DDR3 SODIMM will not fit into DDR2 or DDR memory sockets.

SODIMMs are smaller and thinner than regular DIMMs, and the 204-pin SODIMM PCBs are always ~2.6 inches long and are usually around 1.75 inches high (though the heights can vary slightly). They consist of a number of memory components (usually black) that are attached to a printed circuit board (usually green). The number of memory components on a 204-pin SODIMM's printed circuit board (PCB) can vary, but the PCB will always have 102 pins on the front and the back both, for a total of 204 pins. The gold pins on the bottom of the SODIMM provide the connection between the memory module and the memory socket.