Kingston Technology 1 GB DDR2 CL5 DIMM Memory 2 800 MHz (PC2 6400) 240-Pin SDRAM Single (Not a kit) KTD-DM8400C/1G Includes one 1GB module of 800MHz DDR2 Class 5 Desktop Memory for Dell Replaces Dell A1229321, for use in Dell Dimension 3100,4700,5100,5150,8400, E310, E510, XPS Gen 3 OptiPlex GX280, GX520, GX620, GX75, SX280 and precision workstation 370 desktops Memory designed, manufactured and tested to the specifications of each particular brand name computer system From the industry leader in PC memory 240-pin DIMM type