IS there much of a difference between the AMD Athlon II X4 645 Propus 3.1GHz vs the x4 620?
I would take the higher clocked cpu if you dont plan to overclock or plan to get a cheap mobo.I once tried OC from a Nvidia chipset and it only OC from 3.1ghz to 3.3.Whether using prime or stress testing i still couldnt get it stable what my vcore settings were.