I havn't really messed with it, I have an FX-57 for overclocking, but its running now at 2.8GHz with stock volts.
I have played with one other CACJE it was a 0545APAW i think. did 2.92GHz with stock volts, suicide at 3.2GHz, but I didnt like how it acted. If it was unstable in Super Pi it would just lock up instead of throwing an error. And cold bug kicked in at 10C really bad