Ricoh PFU S26361-F4026-L116 16 GB DDR4‑2666 MHz (PC4‑21300) ECC registered DIMM (RDIMM) server memory module from Fujitsu. It uses a 288‑pin DIMM form factor, supports Error‑Correcting Code (ECC) for improved data integrity, and features dual‑rank ×8 architecture with a 1.2 V operating voltage and typical CL17‑19 latency