OWC 16GB DDR4 2933MHz PC4-23400 ECC Registered RDIMM 288-Pin 2Rx8 1.2V memory RAM module, with the exact same specifications as Hynix part numbers HMA82GR7CJR8NWM, HMA82GR7DJR8NWM and HMA82GR7JJR8NWM. 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.