Qty 4 Micron Tested New Open Box Memory Sticks. The New Crucial 128GB ( 4 X 32GB ) DDR4 2666MHz ECC Registered Memory Ram CT32G4RFD4266 is a high-quality server memory module designed for enterprise networking and server applications. With a total capacity of 128GB spread across 4 modules, each with a capacity of 32GB, this DDR4 SDRAM RAM offers fast performance at 2666MHz. The memory features ECC error correction and is registered, ensuring reliable operation even in demanding environments. Manufactured by Crucial in the United States, this RDIMM memory module with 288 pins is a crucial component for enhancing server efficiency and performance.