I just would like to comment that a BIOS upgrade for my eyes improved the performance of my CPU.
I have the same configuration you guys have on your test machine and after I upgraded to the 1.4 Bios i noticed a considerable raise in performance. I started with bios 1.3 on a phenom 9600 BE, I felt a little dissapointed. Later upgraded to bios 1.4 and noticed a big difference, now I got a 9850 phenom and another k9a2 platinum at bios 1.3 and again felt disapointed. After the upgrade the machine is acting VERY different!
If you go to MSI website and go to the k9a2 platinum site, it has a CPU unit compatibility and it shows that the new B3 processors must use Bios 1.4 for full compatibility.
Just a comment, probably you guys already knew that but... just to remind.
Paulo Basseto.