If you system is running slow, chances are that your memory is probably running too many applications and there isn’t enough memory on board to swap them out. Well, you can now upgrade your memory to take advantage of the chipset. e.g. DDR3-2400 or even higher speeds modules.
In this link, there are Pricing Information of the various branded modules from Kingston, G.Skill, Corsair, ADATA, Patriot. Check them out.