Crucial - 2GB DDR KIT (1GBx 2Pcs) DDR-400, PC-3200, SDRAM Memory Module ECC CT2KIT12872Z40B. Manufacturer Part Number: CT2KIT12872Z40B Memory Size: 2GB DDR SDRAM Number of Modules: 2 x 1GB Memory Speed: 200MHz DDR400/PC3200 Module Configuration: 128M x 72