The 404122-B21 is a premium DDR2 memory module from HP, engineered to deliver exceptional performance and stability in server environments. This module is part of the DDR2 400 (PC2-3200) classification, featuring a 240-pin interface for comprehensive compatibility across various server platforms. Presenting DDR2-400 1024Mx72 ECC Reg specifications, it boasts a substantial capacity of 1GB. Tailored with Error Correction Code (ECC) technology, the 404122-B21 significantly enhances system reliability by detecting and correcting a broad array of data errors in real-time. Its Registered (Reg) memory design further stabilizes system performance by reducing the electrical load on the memory controller, a key advantage in maintaining consistent, high-speed data processing. Manufactured with HP's stringent quality standards, the 404122-B21 DDR2 module is an exceptional choice for upgrading servers that require both ECC and registered memory to achieve peak performance and reliability in demanding enterprise applications.