M14x R1 (Intel Graphics HD 3000 to Nvidia GeForce GT 430)

So I have an Alienware M14x R1 that i purchased last February. I am having issues with the graphics card unit. I bought this laptop mainly for gaming and some school work. Lately I have been playing the Dolphin emulator, and I was playing Starfox Adventures, which I noticed was really laggy and choppy, and the audio was often out of sync during the cut scenes. No matter how much I changed the configs in Dolphin it still was at least a little choppy during gameplay. I decided to try out Need for Speed Rivals for the PC and shortly after the download completed I realized that I simply was not going to be able to play this game on my graphics card. I have read on a few websites that Need for Speed Rivals does not like the Intel HD Graphics cards. Since I use this laptop mainly for gaming, I was wondering if I could install my already-purchased Nvidia GeForce GT 430 (purchased several years ago, never installed) I would really like some feedback on swapping graphic cards on my laptop, because my little brother tried installing this very graphics card ( We bought two) and it fried his desktop, making it completely useless.

Now, I just got my Alienware back from the repair shop. I set it on the roof of my car and drove away without putting it in. 5 Months later and $1,000 later I have it back. So needless to say, I don't want to screw anything up. Just wondering if my specific model supports the GPU i am going to be swapping?