ECC REGISTERED UPGRADE: This type of memory is used in Workstations and Servers. It will NOT be compatible with standard desktop computers. Also, it cannot be mixed with UNBUFFERED memory. OWC 16GB UPGRADE: Consists of a single 16GB DDR3 1600 PC3-12800 CL11 2Rx4 240-pin 1.5V ECC Registered DIMM Memory RAM Module Upgrade memory module compatible with Supermicro Motherboard models X9DAE Series, X9DAi Series, X9DBS Series, X9SRA Series And X9SRE Series. INDUSTRY LEADING: Consumer-friendly Advanced Replacement Program and Limited Lifetime Warranty, which includes Free Tech Support by Other World Computing. MAXIMIZE YOUR SERVER: With OWC's ECC Registered Server Memory, you will extend the life of your old infrastructure or save money when building a new one. Replacement for Supermicro part numbers MEMDR316LHL01ER16, MEMDR316LSL01ER16, MEMDR316LSL03ER16 and MEMDR316LSV01ER16.