AddOn 16GB PC3-8500 DDR3-1066MHz ECC Registered CL7 240-Pin DIMM Quad Rank Memory Module. The AddOn 16GB DDR3-1066MHz ECC Registered memory module is designed for PowerEdge servers, offering robust performance and reliability. With quad rank configuration and a CL7 latency, it ensures efficient data processing and system responsiveness. This 240-pin DIMM module meets high standards for stability and integrity in server environments, making it an ideal choice for enhancing server capabilities with increased memory capacity.