I haven't had time to read this entire thread, but I'll try to do so today. I just wanted to post my initial observations with overclocking my CBBE 0615DPMW Opteron 170. I ran it at 280x10, 1.375 Vcore overnight, and it passed 10 hours of Orthos blend! 2.8 GHz with minimal effort is pretty awesome IMO. Temps seem to be maxing out at 48-49C at these settings according to CoreTemp. To take memory stability out of the picture, I used the 200 MHz (1/2) divider, putting the memory at 140 MHz.
Unfortunately, I'm going to have to compromise with my memory settings, because once again there is some quirkiness with my Ballistix memory and the dividers on this board. However, now it is the 266 divider (2/3) that is unstable while the 333 (5/6) divider is perfectly stable, whereas the opposite was true with my Venice core and Deluxe board. Go figure, just when I could really use that 2/3 divider...

So today I will be -*test*-('")ing 280x10 with RAM on the 5/6 divider, putting it at 234 MHz @ 2.8V with timings of 2.5-3-3-8 to be conservative. I really wish I could keep this RAM at or below stock given that I'm on my 4th set of Ballistix modules! I really don't want another dead module after 3-4 months. However, it looks like my options are to overclock by 35-50 MHz, or significantly underclock by using the 1/2 divider.