What do you mean by upgrade? I don't think the laptop is upgradable like desktop. What kind of games do you play? If you want to play smoothly with the GT 630M, you need to lower down the graphics settings of the games that you play. For 2010 and 2011 games, the gpu is capable of medium settings for most of them. But for 2012 to 2013 games, you really need to play in the lowest possible settings. I made this recommendation based on the benchmarks of your laptop that you can find here
. As I said, its really depend on the games that you play but you will need to play in the lowest settings for more demanding games. Oh, you could also lowered your resolution in the games too but it won't be pretty.
You could also try application such as Razer Game Booster
to improve your frame per second but it won't make big difference. Last but not least, you could also try lowering the settings via Nvidia Control Panel, it can give you a big boost too. Oh, don't forget to upgrade your driver. If none of them helps, I'm afraid that you can't do anything except to buy a better laptop or build a new pc.