you got pretty low clocks and pretty high voltage like others said.
my C2 955 is running smooth at 3.7GHz with 1.3875v. I just cannot get it stable over 3.7 no matter what voltage I set it to.
my HT and NB I always OC through the BIOS but for the CPU I use K10STAT now to set my own Power State Steps and it works perfect.
power state step 1) 800MHz @ .9v
step 2 & 3) 3.2GHz @ 1.25v
step 4) 3.7GHz @ 1.3875
NB: 2600MHz @ 1.2625v
this is with a Hyper212+ cooler and it stays below 45° no matter what's goin on, usually in the 30s though. before on my stock cooler I had it at 3.6GHz with 1.365v and it got up to 58° sometimes during serious gaming and stress tests. with the stock cooler 3.7GHz just got too hot for me too fast.