Exchanging G73sw graphic card

Hi I am curious and I understand this is a lame question but I have no knowledge of the tech not to mention its market, I am about to replace my original GPU for my laptop G73SW, which I broke in a moment of anger with a punch.

Now I know that this is a silly thread and I was ignored on numbers of forums before, but please understand that I am genuinely a dummy dumm dumm when it comes to PC's and I have no clue how to proceed on this.

Here's the detailed story (skip if you want):
I had...

Exchanging G73sw graphic card

Exchanging G73sw graphic card