This HP 726719-S21 compatible 16GB DDR4-2133MHz dual rank registered ECC 1.2V 288-pin CL15 factory original RDIMM is 100% guaranteed to be compatible with your system and to work right the first time. All of our server memory is built to strict JEDEC standards at one of the tier 1 facilities (Samsung, Micron, or Hynix). Our products are also guaranteed by federal law to not affect or void OEM warranties.

• DIMM 16 GB capacity is enough to execute all memory hungry programs simultaneously
• DDR4 SDRAM interface synchronizes electrical and clock signals for an efficient data transfer rate
• No matter how heavy and numerous the applications that you are using, 2133 MHz memory speed with Registered signal and CL15 latency will run them smoothly