If you just bought a new desktop PC powered by a third-generation Core processor, we see little reason to trash it and upgrade to a Haswell-class rig. If your machine is four or five years old, on the other hand, an upgrade will surely do you good. We just don't have enough information to make a recommendation with regard to thin-and-light notebooks, because we don't yet have one to test. Stay tuned on that front.
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