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 otherr 184 pin dimms are used to provide ddr sdram memory for desktop computers standard 184 pin dimms are available in pc1600 ddr sdram pc2100 ddr