I was talking about the CCBWE dualies...and you shouldn't take everything I say as fact as I don't claim to know everything and haven't personally tested out each individual stepping myself
And of course with the singles the CABNEs and CABYEs will both generally be better than the CAB2Es IMO but of course you don't know until you test it out for yourself...I personally haven't seen an single core Opteron struggle with 2.8GHz though