There are better options than either of those right now. But a Quad core is always going to be more versatile than a dual core. There are some games that will perform just as well with a dual core as a x3 or x4, as long as there is nothing running in the background, but having the extra cores enables you to multitask. More and more games and apps are multithreaded, so anyone looking for a gaming rig should really be looking quad core. (Preferably on a modern chipset like AM3, P55, or x58) If all you want is an internet/htpc/office PC, you can still easily get by with a dual core.