Yes, and No.
Its a really good CPU, it can OC well, and i dont think it was far from the C2Q benched IIRC. Correct me if im wrong.
But not many games will utilize all 4 cores, i think so far, Crysis, and GTAIV is the only games that benefits from it. There might be others, but i think an dual core will run fine on it.
But with the prices of Quads now, its highly recommended to get a Quad