Axiom Memory 4X77B07420-AX 64 GB DDR5-6400 ECC RDIMM for Lenovo

Increase installed memory capacity in a compatible Lenovo server with a 64 GB DDR5-6400 ECC registered DIMM. Axiom Memory 4X77B07420-AX pairs the DDR5 generation and 6400 speed grade with ECC protection, addressing server workloads where memory integrity and capacity planning matter. Its RDIMM construction targets systems that accept registered server memory rather than unbuffered desktop DIMMs. Use this module when the host platform's memory population rules call for a 64 GB ECC RDIMM and the existing configuration is based on Lenovo-compatible server memory. The registered interface is a material selection point: it must match the memory type supported by the server, not merely the physical DIMM socket. DDR5-6400 also needs to align with the platform's supported memory speed and processor configuration. This specific option combines 64 GB capacity, ECC, RDIMM architecture, and DDR5-6400 operation in one Lenovo-compatible module. Those attributes distinguish it from capacity variants, non-ECC DIMMs, and unbuffered memory that may share the DDR5 label but address different host requirements. Select it where the server documentation calls for a 64 GB DDR5 ECC RDIMM at this speed grade, then apply the platform's prescribed population order.