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 4 GB Memory from and you will notice that everything starts working smoothly. This 2 x 2 GB Memory Kit is specifically designed to work with Sun Microsystems Sun Fire V40z Server.