I have an acer aspire 5742g :
intel core i 5-460m
nvidia geforce gt 420m
4gb ddr3 ram
I enjoy playing video games but find that sometimes they lag quite a lot for example I get 60 fps when playing on medium specs on wow but it quite often drops to 30 when near water.
My question is should I upgrade my Ram ,gpu or laptop ?
My budget is quite small , 1-1.75 hundred .