lol you post the same question in multiple forums
I'm tellin ya, stepping is far more important than week. CCBBE are just like CCB1E, your standard dual core coldugged stepping that consistently hit 2.8 - 3 Ghz. And of course more on watercooling and even more with IHS removed.
Basically all Opterons that coldbug (CCBBE, CCB1E, CCB2E [fx60]) overclock pretty good, 2.8 to 3 Ghz. There are SOME trends, like from what i've seen, 0608s are the best, while 0610 and 0550 are pretty equal. But the gap there is pretty small, i mean CCB1E 0608 vs. CCBBE 0610 there's a very small gap. Compare it to a non-bugged stepping like CCBWE and you'll find something more like a 170 Mhz gap.
I would take ANY CCBBE over ANY CCBWE, probability wise that's the best. Unless you're trying to run on phase...