16GB ( 1x 16GB Module ) DDR4 2400 MHz ( PC4-19200 ) DDR4 DIMM ( 288-Pin ) ECC UDIMM ( ECC Unbuffered DIMM ) 1.2V - DDR4 Standard Voltage Compatible Equivalent for HP 862976-B21, 1CA75AA, 1CA75AT, 862690-091, 869538-001 High performance Memory RAM upgrade designed for Server/Workstation Systems All modules undergo quality assurance testing to ensure dependable and reliable performance Please verify the supported memory (RAM) specifications of your system prior to purchase to ensure compatibility A-Tech provides a Lifetime Warranty for all orders & offers complimentary United States based Tech Support before, during, & after your purchase