Curious about 140mm rad

I'm not planning on water cooling anytime soon, but if somehow I go towards a WC route in the future I'm curious about one little thing.

I would like to know if a single 140mm radiator is capable enough to cool a Core i7 cpu only? Of course that also includes if the cpu is overclocked.

Thanks

Yea, but I can't say that would be worth the money for the rad, cpu block, tubing, res. It would probably be better to get a Corsair H50. The H50 wouldn't perform quite as well, but that's extra money in the pocket.