The UCS-ML-X64G4RS-H is a specialized DDR4-2666 MHz ECC Registered DIMM (RDIMM) module from Cisco, optimized for server environments where error correction and system reliability are critical. With a substantial 64GB capacity and a 4Gx72 ECC Reg/RDIMM 2Rx4 configuration, it is designed to handle the demands of high-end servers, providing increased bandwidth and improved data integrity compared to unbuffered memory. The 288-pin module operates at a standard voltage, ensuring compatibility with a wide range of server motherboards while maintaining energy efficiency. The inclusion of ECC (Error-Correcting Code) technology significantly reduces the risk of data corruption, a critical feature for mission-critical applications in data centers and enterprise IT infrastructure. Cisco's rigorous testing standards ensure that this memory module delivers sustained performance and reliability, essential for server uptime and business continuity.