No one knows, but it will work in AM2 motherboards. But as cah027 said, it will not have all the feature available unless you get an AM2+ board. I don't think it would cut performance by much or else they would probably not go to the trouble of making it AM2 compatable. Of course it could just be that AMD is doing that because they are struggling and want people to upgrade so that they stick with AMD. Either way I trust that AMD knows what it is doing and is getting their act together. Whoops, sorry, got a little off-topic there....