Kingston Technology 2 GB DDR2 CL5 DIMM Memory 800 MHz (PC2 6400) 240-Pin SDRAM Single (Not a kit) KTD-DM8400C/2G Includes one 2GB module of 800MHz DDR2 Class 5 Desktop Memory for Dell For use in Dell Dimension E520 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