This Lenovo® 7X77A01303 compatible 16GB DDR4-2666MHz dual rank registered ECC 1.2V 288-pin CL17 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
• DDR4-2666/PC4-21300 operates at an effective bus speed with minimal power consumption and as a result, you get optimal computer performance with an improved memory heat dissipation
• Up to 2666 MHz speed with Registered signal and CL17 latency for smooth computer performance