That seems ridiculously hot. I would check your seating on that heatsink. I am curious as why you skimped on the heatsink when you have the creap of the crop amd proc? You could have spent a few more dollars and got the cocage true spirit.
I have it at stock speed atm. I disabled quiet and cool because it didn't appear to be O/C friendly with my 720BE. Does it work better with the quad cores?
I have a X4 940 w/ stock HSF running around 46-50 Idle as well. Its been like that for months, I have built many pcs in my day and know not to put too much paste on my CPU. Hell who knows maybe i screwed up this time.
What is a good cooler for AM2/AM3 that doesnt require me yanking the board, I'm lazy and don't want to pull all the stuff outta my neat little Mirco ATX case.