Sobcheck

I have a HP DV6-6135DX laptop computer. This computer was bought by me a few months ago under the impression that it was a good gaming laptop (Not great, but good). I have since installed Arma 2: free and I love this game! My only problem is that my screen can get choppy while I play. I want to buy the full version and even Arma 3 when it comes out but I don't know if my laptop will be able to handle those. I noticed that Arma 2: free doesn't even come with the HD graphics that the full version does. Basically what I am looking to do is find a way to get my laptop to run the full version and Arma 3 on a pretty high graphics setting without having my screen get choppy. Here are my laptop specs: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02880009&tmp_task=prodinfoCategory&cc=us&dlc=en〈=en&lc=en&product=5118737 So I was thinking that upgrading my hard drive to a 7200 rpm might help along with installing 2 more GB or ram. I think my processor and graphics card are pretty much good enough to run any Arma game, right?