In your situation more ram would probably help. I wouldn't expect a huge increase but it would put you back over the mins. With the integrated chipset you are using it is sharing its vram with your physical ram. Thus dropping your ram down to 1gb during gameplay. This is why you experience random fps drops. If you bump it up to four that means while playing the game your have 3gb to use for ram and 1gb for vram. Now I wouldn't expect any large boost in performance but it might fix the randomness of your fps drop. Also, $2000(assuming usd) seems a bit high for a computer with those specs. I have a toshiba satellite that ran me $400 at wal-mart with the exact same specs. I also bought it back 2010. If you have a little bit of money to blow I would recommend building a desktop. My current build cost me under $700. I have a 450gts, 6gb ram, and a 2.9ghz amd triple core processor. It is not a perfect build but it runs this game great at 40-60fps. It really is a great budget build. Anyways I know how tight money can be so do what you can with what you got good luck.