Most oem boards require a bios update to work with newer cpus. You'll just have to try it. Acer has no bios updates for it's boards that I know of. If it doesn't post, be prepared to change to a micro atx board. I have biostar and msi 6150se boards; they're cheap and work with any am3 cpu up to 95 watts.
Just got it in another thread that have the same question. And there's the answer... but I don't hold it as cast in stone until the info comes from Acer website... This I leave up to the OP to find out for himself.