My current system configuration is: Intel Core i3-4160 CPU @ 3.60GHz, 4.00 GB RAM, Intel HD Graphics 4400. I'm running Windows 7 Ultimate 64-bit SP1 and have many development software installed like Visual Studio, PHP Storm and graphics software like Photoshop. Many a times the system lag time is very high. Will adding an additional 2GB RAM will boost the speed of my computer. Please help.