First I would see if there is a QVL and then look at the specifications of the mother board and see if that cpu is compatable. I have never used AMD but with Intel you have to have the right socket that has the pin count of the cpu. If the spec's tell you what cpu's are compatable but dosn't mention your specific cpu see what the power rerquirements is of the cpu's that are listed and see if any are even close. Sorry to say but chances are with that mother board being 3+ years old it's not compatable.
In any case you would update the bios with the newest release before you install the new cpu. If you cannot find out any concrete info on compatability then it would be a risky situation to put in that cpu.