This Lenovo 4X70F28587 compatible 16GB DDR3-1866MHz dual rank registered ECC 1.5V 240-pin CL13 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
• DDR3 SDRAM 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 1866 MHz speed for playing the latest games and using heavy software