CPU and RAM memory are among the most important factors to determine computer's power. The first one refers to the velocity of the computer to operate data; the second one refers to the amount of memory the PC has in order to handle those data. This is one of the cases in which it's always true to say, the more the better. Unfortunately, we are not always financially able to upgrade our computer.
Another way to increase the performance of your PC is to use a program that optimizes the usage of these crucial components, CPU and RAM. Mz Ram Booster is a free application that is supposed to do so. It's fairly friendly to use and there is also a comprehensive manual at your disposal. For non-expert users I would just recommend pressing the 'recommended settings' button and applying the settings before closing the program. This will free RAM when CPU usage is lower then 30% and will auto optimize the memory every two hours.
It is also interesting that you can set the CPU's priority, choosing to give the best response time to foreground applications or to background ones, or to apply the same priority for both. You can also set your processor's L2 cache size if you know it exactly, otherwise run CPU-Z to get the exact number of Kilobytes.
Give your computer a boost improving RAM and CPU usage. It can make a difference, especially if your computer is not particularly powerful, otherwise its benefits may be limited.