crucial technology ct25672ab667sp 2 gb ddr2 pc2-5300 cl 5 registered ecc single ranked ddr2-667 1.8 v 256meg x 72 memory
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 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 . the ballistix and ballistix tracer high-performance memory do not come in 72-bit or registered 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 .