Ok boss, theres 2 ways to do this, either out class the game, normally with a laptop this involves having a laptop 1-2 gens new than the game itself. Or you can just look up the minimum system requirements for the game and then reference your computers part to that, normally laptop parts arent a direct comparison to their desktop counterparts. Good for you that your in the right place, Toms Hardware has a great section on GPU and CPU hierarchy. As far as what you have posted, you didnt say "OMG I wana play Skyrim on my laptop" but Rome 2 is pretty intense if I remember correctly.
TLDR; Either have a really new laptop for older games, or Look up the system specs for the games you want to play and find the match ups here on Toms