Which computer would be better for gaming the Toshiba Qosmio X305 laptop or the Dell XPS 630 desktop

Well, if you want a powerful computer for games and do not need mobility, then the Dell desktop PC is definitely your choice. On the other hand, if you do need mobility, go for the Toshiba. Note, however, that the battery on it will run out fast, and you can not upgrade laptops as easy as desktop PCs. So basically, if you need pure, raw performance, go with the desktop, but if gaming on the move is your priority, the Toshiba is perfect.