Increasing the memory of your system is one of the best ways to improve performance. Additional memory allows you to open more applications simultaneously while providing the power needed to make them run quickly. It enhances the performance of your system allowing you to work faster and reap improved performance of up-to-date applications and operating systems. Plug-in this 208-pin 4 GB Memory Module from and you will notice that everything starts working smoothly. This memory module is designed to work with IBM eServer pSeries p5 Model 510 / Model 520 / Model 550 Servers.