For gaming they're both more or less equal. The Phenom II X3 720 being negligibly faster in gaming because of L3 cache. The extra core of the Athlon II X4 tends to go unutilised for gaming. For almost everything other task the Athlon II X4 620 is better. No doubt, the Athlon II X4 620 is the better choice all round as newer games will start using the full potential of quad cores and so you're future-proofed too.
For gaming they're both more or less equal. The Phenom II X3 720 being negligibly faster in gaming because of L3 cache. The extra core of the Athlon II X4 tends to go unutilised for gaming. For almost everything other task the Athlon II X4 620 is better. No doubt, the Athlon II X4 620 is the better choice all round as newer games will start using the full potential of quad cores and so you're future-proofed too.
Yes hskpunjabi, layzee's suggestion is absolutely true. Right now games are not optimized for utilizing all the cores present in your processor. But in very near future it will be. But in all the other tasks like Audio/Video Editing, Designing, the extra coe will give you a defineite performance boost over the extra L3 cache.
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