HP 647653-081 COMP 16GB DDR3-1333MHZ ECC CL9 DR RDIMMAddOn 16GB DDR3 SDRAM Memory Module 16 GB (1 x 16GB) DDR3 1333 PC3 10664 DDR3 SDRAM 1333 MHz Dual rank Memory CL9 1. 35 V ECC Registered 240 pin DIMM Lifetime Warranty VPN: 647653 081 AM SKU: RSC259544 UPC: 821455636831 Whether you are playing games, using heavy loaded OS or video editing software, the DIMM 16 GB of memory will make them run in a flash Up to 1333 MHz memory speed with CL9 latency to manage your routine softwares with pace and accuracy