Kingston Technology 1 GB DIMM Memory 2 400 MHz (PC2 3200) 240-Pin DDR2 SDRAM Single (Not a kit) KTD-DM8400/1G Includes one 1GB module of 400MHz DDR2 Desktop Memory for Dell Replaces Dell A0375068, A0375069, A0388045, and A0743606, fits dimension 3100,3100c,4700,4700c, 5000,5100,5150,8400, e310,e510,xps gen3, optiplex gx280,gx520,gx620, gx745, and SX280 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