Whenever CPU manufacturers decide it’s time to change key features of
their processors, there’s always a transition time where you are left
deciding if you want to move to the new features or keep what you have.
With AMD’s latest move to DDR3 memory and the AM3 socket on the Phenom
II, they’ve worked with some motherboard manufacturers to make that
transition a little easier. They’ve managed to release motherboards
that are both compatible with AM2+ and AM3 sockets, and support DDR2,
and we are reviewing one of those boards today.

http://www.futurelooks.com/asus-m3a7...rboard-review/