1PCS DDR3 4G 4GB 1333 2Rx8 UDIMM ECC Server Memory — Compatible with Z400 Z420 Z600 Z800

Single module (1PCS) DDR3 server memory with 4G / 4GB capacity and 1333 frequency. Features a 2Rx8 dual-rank design in UDIMM form factor and ECC error-correction support. Built as a direct replacement or upgrade for Z400, Z420, Z600 and Z800 systems to deliver reliable server-class memory performance.