Hello fadedrs,
Did you know you can unlock the 4th core on this bad boy ?, Enable ACC in the BIOS (if you can) to enable the 4th core, but if you do that i would run Prime 95 just to check the 4th core is good. (AMD dont like it though and on the later one's they laser etched the crap out of the 4th core). How much were you hoping to get out of this CPU ?, i would leave the voltage on auto for now and bump up the frequency, try +5 at a time untill you get issue's (most likely a BSOD), or you reach your desired speed, if you get a BSOD up the voltage, i think the stock voltage is 1.3V but you would need to check this. Go here and have a read,
Ultimate Overclocking & Stability Testing - Dev Hardware
Next go to the AMD site and check the spec's for your CPU.
Products & Technologies
Also you will need speedfan to check the temp's and CPUz to check the speed and the voltage.
I have seen these up to 3.5Ghz without too many issue's, just keep an eye on the temp's. (of course they will go higher but you get into cooling issue's then). Give it a go and post your result's. Good luck.