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 8GB UPGRADE: Consists of a single 8GB DDR3L 1600 PC3L-12800 CL11 1Rx4 240-pin 1.35V ECC Registered DIMM Memory RAM Module Upgrade memory module compatible with Supermicro Motherboard models X9DAL Series, X9DAX Series, X9DB3 Series, X9DBi Series And X9DBL 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 MEMDR380LHL07ER16, MEMDR380LSL10ER16, MEMDR380LSL14ER16 and MEMDR380LSV04ER16.