HP 647653-181 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 181 AM SKU: RSC955133 UPC: 821455579633 DIMM 16 GB of memory to maintain symmetry with processor and hard drive and bring out the ultimate computing experience 1333 MHz speed to execute routine softwares at a steady pace 240 pin pin DDR3 1333 PC3 10664 interface multiplexes