Crucial 4GB DDR2 RDIMM memory module 1 x 4 GB 667 MHz ECC 1.8 V

Crucial's high-density DDR2 Very Low Profile (VLP) DIMMs are uniquely designed for today's blade server and network router technology, meeting the ATCA form factor guidelines and offering an optimized solution for today's server room needs. Compatible with existing RDIMM sockets, these modules significantly boost your overall telecom and networking capabilities by addressing the biggest design challenges in today's networking and server applications: space, speed, airflow, thermal power consumption, and more. That means your organization will reap the benefits of less motherboard space dedicated to DRAM, while improving airflow and 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. 240-pin DIMMS 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 DIMMs are used to provide DDR2 SDRAM memory for desktop computers. DDR2 is a leading-edge generation of memory with an improved 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, and PC2-6400 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. 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 DDR2 DIMM is closer toward the center of the module.