HP 500207-171 COMP 16GB DDR3-1066MHZ ECC CL9 QR RDIMMAddOn 16GB DDR3 SDRAM Memory Module 16 GB (1 x 16GB) DDR3 1066 PC3 8500 DDR3 SDRAM 1066 MHz Quad rank Memory CL9 1. 35 V ECC Registered 240 pin DIMM Lifetime Warranty VPN: 500207 171 AM SKU: RSC439697 UPC: 821455579206 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 1066 MHz memory speed to manage your routine softwares with pace and accuracy 240 pin pin DDR3