The HP 593339-B21 is a 4GB DDR3 memory kit designed to enhance the performance of your HP server. Operating at a speed of 1333 MHz (PC3-10600), this memory module significantly increases your system's processing capabilities by providing faster data transfer rates and reducing latency. It is specifically engineered for compatibility with various HP server models, ensuring a reliable and seamless memory upgrade. With this ECC (Error-Correcting Code) memory, your server benefits from added data integrity and reliability, reducing the overall risk of data corruption and system crashes. This single 4GB module allows for straightforward installation and future upgradeability, making it an efficient and cost-effective way to improve your server's performance and multitasking capabilities.