Conclusion: As was evidenced by our test results, the Athlon-II X4-645 offers great performance for its price range. It competing very closely with processors costing a lot more. The most important thing, however, is just the simple fact that it can get the job done. Whether you are interested in gaming, productivity, or just simple web browsing and word processing, the Athlon-II X4-645 offers the ability to do it all.
Cons: $23 more than X4-640 for only a 3% increase in performance