Ricoh PFU FPCEM760AP 4 GB DDR3‑1600 MHz (PC3‑12800S) SO‑DIMM memory module designed for notebook computers, compliant with standard 204‑pin DDR3 SO‑DIMM specifications. It features unbuffered, non‑ECC DDR3 SDRAM and operates at 1.5 V, providing a reliable memory upgrade for compatible Fujitsu LIFEBOOK and other notebook models that support DDR3‑1600 SODIMM modules.