I have am2 plus motherboard and phenom 11 x4 850 processor..now I need to upgrade as I want to run Adobe illustrator and maya. What should I do.do I need to buy new mother board or can I upgrade existing board with ram and graphics..I dont have much money..what's practical way to do this.i can buy 4 GB graphics card and 16 GB ram..do I need to change processor..please advice