Kingston Technology 4 GB DIMM Memory 1066 MHz (PC3-8500) 240-Pin DDR3 SDRAM Single (Not a kit) KTD-XPS730A/4G Includes one 4GB module of 1066MHz DDR3 Desktop Memory for Dell Replaces Dell A2984884, A2984885, A3708118, fits optiplex 380 and 580, workstation t1500, xps 435,9000, desktop, vostro 430, and xps 730x 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