Crucial 4gb ddr3 1600 mts pc3 12800 cl11 unbuffered ecc udimm 240pin 135v15v 4gb 9 chip crucial 240 pin dimms are used in ddr3 memory for desktop computers ddr3 is the latest generation of memory with an improved architecture that allows it to transmit data more quickly 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 be