OWC 128GB DDR4 3200MHz PC4-25600 CL22 1.2V 288pin Server DIMM ECC Registered memory compatible with Supermicro Motherboard models H11SSL-i, H11SSL-NC, H11SSW-iN, H12SSW-iN and H12DSG-O-CPU. 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. 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 MEMDR412LHL01ER32, MEMDR412LSL01ER32 and MEM-DR412MC-ER32.