I am all times in search of pre-built systems on a financial plan. I one time had an AMD Phenom II x4 organization with 8GB Corsair Dominator XMS2 RAM and an ATI 4980. It worked very well for part 8, Assassins Creed and Halo. The whole system and that incorporated a Cooler Master Case, Wireless and networking cards, LightScribe DVDRW and 500GB HDD. I would search for something alike if I were you.