OWC 128GB DDR4 2666MHz PC4-21300 CL19 1.2V 288pin Server DIMM ECC Registered memory compatible with Supermicro Motherboard models M11SDV-4C-LN4F, M11SDV-4CT-LN4F, M11SDV-8C+-LN4F, M11SDV-8C-LN4F and M11SDV-8CT-LN4F. 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. 100% COMPLIANT: With JEDEC-Standard specifications, ROHS Compliant, Warranty Safe Upgrade. Designed and Tested to Meet or Exceed all Manufacturer OEM Specs. 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. INDUSTRY LEADING: Consumer-friendly Advanced Replacement Program and Limited Lifetime Warranty, which includes Free Tech Support by Other World Computing.