16GB ( 1x 16GB Module ) DDR4 2133 MHz ( PC4-17000 ) DDR4 DIMM ( 288-Pin ) ECC RDIMM ( Registered DIMM ) 1.2V - DDR4 Standard Voltage Compatible Equivalent for Kingston D2G72M151, HP21D4R5D4MBM-16, KTM-SX421/16G, KVR21R15D4/16, KVR21R15D4K4/64, KCS-UC421/16G, KTH-PL421/16G 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