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.
Cons: $23 more than X4-640 for only a 3% increase in performance
Summary: Looking back at the performance graphs, Athlon II X4 645 performed as expected in every way, both good and bad, and even throwing a few pleasant surprises along the way. Strong points for this processor are by far its reasonable price, and fast four physical CPU cores that in some cases perform...
Pros: Very fast clocked budget Quad Core, Reasonably priced, Lots of computing power in multithreaded applications, Compatibility with older chipsets, Low operating temperatures, Power consumption improvements over C2 revision Athlon II X4
Cons: Lack of L3 cache is noticeable in some cases, Oscillating performance, depending on application, Gaming performance