The 500656-B21 is an HP-manufactured DDR3 ECC Registered DIMM, designed to enhance the performance and reliability of HP servers. With a configuration of 256Mx72, this module provides a capacity of 2GB, making it an ideal choice for small to medium-size applications or as an addition to existing memory configurations. It operates at the standard speed of DDR3-1333 (PC3-10600), ensuring compatibility with a wide range of server systems and facilitating quick data processing. The module's ECC (Error-Correcting Code) capability significantly reduces the risk of data corruption, a critical feature for servers handling crucial data. The 500656-B21 module also features a 2Rx8 configuration, balancing performance and density for efficient memory utilization. It's engineered as a single 2GB module, allowing for flexible system upgrades or replacements. This HP memory module's emphasis on stability and compatibility makes it a dependable choice for enhancing server performance.