Integrated video card?

So i just baught this sweet emachines computer from wal-mart, its great, but all it needs, is a better video card, and then, i think it might be my gaming computer for new games. But, the video card is a nvidia 6150se, which isnt all that great, and its integrated, what does integrated exactly mean? Can it be replaced with a better video card? please help, Thanks!|||It can be replaced, but depending on the case design you will be limited in options and you can usually not do it at home (easily at least). Always go for the upgraded video card, everything else is easy to upgrade.|||My brain started shutting off at "sweet emachines" and died at "wal-mart". eMachines makes dumpster-dive crap. Wal-mart overcharges bigtime for computers and parts. You only call it "awesome" because you obviously don't know any better.|||integrated means its built into the mobo so you can get a better card, as long as you have the right slot.