OWC 32GB DDR4 2666MHz PC4-21300 CL19 1.2V 288pin Server DIMM ECC Registered memory compatible with Supermicro Motherboard models X11SRA, X11SRA-F and X11SRA-RF. 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 MEM-DR432LC-ER26, MEMDR432LCL01ER26, MEMDR432LCL02ER26, MEMDR432LCL03ER26, MEMDR432LCL05ER26, MEMDR432LHL01ER26, MEMDR432LHL03ER26, MEMDR432LSL02ER26, MEMDR432LSL03ER26 and MEMDR432LSL04ER26.