DELL SNP20D6FC/16G COMP 16GB DDR3-1600MHZ DR X4 RDIMMAddOn 16GB DDR3 SDRAM Memory Module 16 GB (1 x 16GB) DDR3 1600 PC3 12800 DDR3 SDRAM 1600 MHz Dual rank Memory CL11 1. 35 V ECC Registered 240 pin DIMM Lifetime Warranty VPN: SNP20D6FC 16G AM SKU: RSC203539 UPC: 821455233863 16 GB of memory to maintain symmetry with processor and hard drive and bring out the ultimate computing experience 1600 MHz of memory speed allows you to browse web, listen to songs and use routine software simultaneously DDR3