This Lenovo® 4X77A77029 Compatible 16GB DDR5-4800MHz single rank registered ECC 1.1V 288-pin CL40 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.
