You kidding? That's pretty good, considering the price. Also, depending on what model, you can unlock the other two hidden cores!
The Athlon X2 6000+ is based on a dual-core die, it has no disabled cores. And don't refer to them as hidden cores. They aren't hidden at all, just disabled. Furthermore, it depends on the motherboard having ACC support, which his most likely does not.
You were most likely thinking of unlocking the multipliers, which is only useful when overclocking.
@koolkody - Wrong.