Here is a bit of scaling information for Phenom II in that definition-of-synthetic benchmark called Sandra 2009 SP2. I have to wonder if these results would be substantially better on another board. As I recall, when I went from my K9A2 Plat or M3A78-T to my A79A-S, my score in IBT went down by like 3-5 GFLOPS at the same clock speed using my 9850. It's hard to remember which board it was since I've blown through so many due to FETs giving up the ghost at lame voltages like 1.40V.

Anyway, you'll notice that scaling is between 99% and 101% for each jump, so in this synthetic test we're seeing linear scaling pretty much.