The LENOVO 30R5149 is a memory kit that includes two 1GB modules of PC2-4200 DDR2 SDRAM, offering a total capacity of 2GB. Engineered with ECC (Error-Correcting Code) technology, this memory upgrade is designed to enhance the reliability and performance of IBM servers that require DDR2 memory. Operating at a speed of 533MHz, this memory kit helps in improving the overall system performance by increasing the processing speed and the ability to run multiple applications simultaneously without significant slowdowns. The inclusion of ECC technology is a critical feature for server environments, as it detects and corrects data corruption, ensuring the system's data integrity and stability. This makes the memory kit ideal for use in various high-demand applications and environments, including database servers, application servers, and virtualization platforms, where continuous operation and data accuracy are vital.