I received my Opteron today, I ended up changing my order from a 144 to a 148 to avoid the wait... plus the 11x multi is handy.
I popped it straight under the prommie to give it a workout and see whats what, but it seemed to get stuck at 280 HTT... It was like the memory controller was cack, but I doubted that was the case somehow. Anyways I fiddled about with the Max Async Latency and managed to push it to 311 x 11 (5:6) for a total of 3.421 GHz @ 1.55v. I've yet to dare trying voltages upward of 1.55v but I wouldn't be surprised if there is still a bit more left in this chip as it was still nice and cool. I'm chuffed with 3.4Ghz but of course I wouldn't say no to more.
The stepping is CABNE 0528 GPMW if that makes any difference.