I don't have a K10, and I have never used this software, but it looks like something you might be interested in if you want to undervolt.
Since I don't have any experience of it myself, I just point to another thread
now i can undervolt/oc WITH CNQ ON!! like in those good old crystalcpuid days... AND BRING IDLE POWER DOWN! Only 142w left for my machine and its even better then crystalcpuid/rmclock, because it just alters the p-states entrys in the msr and then quits. no additional running prog in the background...