240-pin Fully Buffered DIMM
- A dual inline memory module (DIMM) consists of a number of memory components
(usually black) that are attached to a printed circuit board (usually green).
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 to each other.
- 240-pin fully buffered DIMMs (FBDIMMs) are used to provide DDR2 SDRAM memory
for servers and motherboards that use FBDIMM technology, as opposed to
conventional registered DIMM (RDIMM) technology. DDR2 is a leading-edge
generation of memory with an improved architecture that allows it to transmit
data very fast. FBDIMM technology utilizes an advanced memory buffer that allows
modules to be connected in series — meaning that more memory modules can be
connected (and thus memory density is increased) and errors at the connection
points are reduced.
- Each 240-pin DIMM provides a 64-bit data path (72-bit for ECC or registered
or fully buffered modules).
- DDR2 240-pin fully buffered DIMMs are available in DDR2 PC2-4200 SDRAM and
DDR2 PC2-5300 SDRAM.
- 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.
- To use fully buffered DIMMs, your server or motherboard must use FBDIMM
architecture. An FBDIMM will not fit into a standard DDR2 socket, and a DDR2
module will not fit into an FBDIMM socket.
- The number of black components on a 240-pin DIMM can vary, but it always has
120 pins on the front and 120 pins on the back, for a total of 240. 240-pin
DIMMs are approximately 5.25 inches long and 1.18 inches high, though the
heights can 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 fully buffered DDR2 DIMM is
in a different location than the notch for regular 240-pin DDR2 modules.
||16GB (4 x 4GB)
||512Meg x 72
||DDR2 PC2-5300 • CL=5 • FULLY BUFFERED • ECC • DDR2-667 • 1.8V • 512Meg x 72
About Crucial / Lexar Media, Inc.
Crucial is a key brand in the Lexar Media family of products. A wholly owned subsidiary of Micron Technology, Inc., Lexar Media, Inc. boasts one of the most comprehensive offerings of memory product lines in the industry. Lexar Media delivers high-quality, award-winning products in every memory category: USB flash drives, all popular form factors of memory cards, DRAM computer memory for PCs and Mac systems, and solid state drives (SSD).
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We offer a complete line of Crucial products on our website available either as components in custom computer builds or as separate off-the-shelf parts, the product lines we offer consist of
Crucial Memory Modules,
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Crucial SODIMM Memory Modules,
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Crucial Solid State Drives,
and other products. You can also browse all Crucial products.