Crucial 2GB DDR2 800 (PC2 6400) System Memory Module, 240-Pin, Unbuffered, Non-ECC 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. Specifications : P/N : CT25664AA800. Module Size : 2GB. Package : 240-pin DIMM. Speed : DDR2 800 (PC2 6400). Configuration : 256Meg x 64. DIMM Type : Unbuffered. Error Checking : Non-ECC. SDRAM Timings : CL=6. Voltage : 1.8V.