DELL A3721495 COMP 16GB DDR3-1066MHZ ECC QRX4 RDIMMAddOn 16GB DDR3 SDRAM Memory Module 16 GB (1 x 16GB) DDR3 1066 PC3 8500 DDR3 SDRAM 1066 MHz Quad rank Memory CL7 1. 50 V ECC Registered 240 pin DIMM Lifetime Warranty VPN: A3721495 AM SKU: RSC646598 UPC: 821455323359 DIMM 16 GB of memory can produce approx. 10K MIPS and as a result, your system gets more room to run complex apps. Up to 1066 MHz memory speed with Registered signal to manage your routine softwares with pace and accuracy DDR3 SDRAM