Crucial's high-density DDR2 Very Low Profile (VLP) DIMMs are uniquely designed for today's blade server & network router technology, meeting the ATCA form factor guidelines & offering an optimized solution for today's server room needs. Compatible with existing RDIMM sockets, these modules significantly boost your overall telecom & networking capabilities by addressing the biggest design challenges in today's networking & server applications: space, speed, airflow, thermal power consumption, & more. That means your organization will reap the benefits of less motherboard space dedicated to DRAM, while improving airflow & reducing the power needed to cool you system. In addition, our VLP RDIMM modules are backwards-compatible with existing sockets, delivering immediate benefits without any product redesign. 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 & a socket on a larger printed circuit board. The pins on the front & back of a DIMM are not connected to each other. 240-pin DIMMs are used to provide DDR2 SDRAM memory for desktop computers. DDR2 is a leading-edge generation of memory with an enhanced architecture that allows it to transmit data very fast. Each 240-pin DIMM provides a 64-bit data path (72-bit for ECC or registered or Fully Buffered modules). Standard DDR2 240-pin DIMMs are available in DDR2 PC2-3200 SDRAM, DDR2 PC2-4200 SDRAM, DDR2 PC2-5300 SDRAM, & PC2-6400 SDRAM. To use DDR2 memory, your system motherboard must have 240-pin DIMM slots & a DDR2-enabled chipset. A DDR2 SDRAM DIMM will not fit into a standard SDRAM DIMM socket or a DDR DIMM socket. The number of black components on a 240-pin DIMM can vary, but it always has 120 pins on the front & 120 pins on the back, for a total of 240. 240-pin DIMMs are Approx. 5.25 inch