I've got the same mobo, was looking at upgrading my cpu to a phenom II 955 or 965 and found this thread. This review says they are compatible, I hope they are but I can't say for sure.
Can anyone confirm if they are supported?
It doesn't look like i can post the link but it is a review for rev 1.0 and it says:
"This motherboard has Split Power Plane design, with a 4+1 phase power design to support AMD's latest 45nm AM3 Athlon II and Phenom II series multi-core processors. This motherboard will even support 140W processors like the upcoming Phenom II X4 965 Black Edition."