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 -or- ECC LOAD REDUCED memory. OWC 128GB UPGRADE: Consists of 2pcs of 64GB DDR4 2933 PC4-23400 CL21 2Rx4 288-pin 1.2V ECC Registered DIMM Memory RAM Module Upgrade compatible with HP Apollo models 4500 Gen10 And 4510 Gen10. 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 HP part numbers P19045-K21 P19045-B21 P00930-H21 P14636-001 P00930-K21 P06192-001 P03053-CA1 P00930-B21 P03053-1A1 P03053-0A1 P14492-B21 P19045-H21.