HP 664692-001 COMP 16GB DDR3-1600MHZ ECC DRX4 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: 664692 001 AM SKU: RSC934569 UPC: 821455324097 DIMM 16 GB of memory to maintain symmetry with processor and hard drive and bring out the ultimate computing experience 1600 MHz of memory speed with CL11 latency skillfully manages the variety of apps and computational tasks DDR3