Isn't there an extra pin on the CPU that prevents use in non-AM3+ boards? I thought that's why AM3+ sockets are black.
edit: yes, there's an extra pin.
http://techreport.com/review/21813/amd- ... rocessor/4
As we've mentioned, Bulldozer-based CPUs should be compatible AMD's existing socket infrastructure. On the desktop, that's AMD's Socket AM3+ platform, which the company introduced back in May alongside its 9-series chipsets. FX-series processors have 942 pins, one more than older Socket AM3 CPUs, and that pin prevents them from dropping into anything but true Socket AM3+ motherboards. On the flip side, Socket AM3+ boards are capable of hosting older Socket AM3 processors like the Phenom II just fine.
I wouldn't go to an 8150 at all. No x1xx CPUs should ever be bought. If you want to go AMD get an x3xx CPU. And a new motherboard.