This HP® 774172-001 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.

• 16 GB capacity is enough to execute all memory hungry programs simultaneously
• DDR4 SDRAM interface multiplexes 2-bit data from memory cell and I/O buses to minimize processor idle time and enhance your computer's performance
• Up to 2133 MHz speed with Registered signal and CL15 latency for playing the latest games and using heavy software