AddOn 16GB PC3-12800 DDR3-1600MHz ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Dual Rank Memory Module. The AddOn 46W0674-AM memory module offers 16GB of DDR3-1600MHz ECC Registered RAM in a 240-pin DIMM format. Operating at low voltage (1.35V), it features dual rank configuration and CL11 latency, ensuring stable performance and reliability. Ideal for servers and workstations requiring ECC (Error-Correcting Code) memory, this module enhances system efficiency and data integrity during demanding computing tasks.