Ricoh PFU S26361-F4083-E364 64 GB DDR4‑2933 MHz (PC4‑23400) registered ECC (Error‑Correcting Code) memory module from Fujitsu designed for enterprise server systems. It uses a 288‑pin DIMM form factor with registered (RDIMM) buffering and dual‑rank ×4 architecture, delivering reliable high‑capacity performance and data integrity for workloads in Fujitsu PRIMERGY servers